What’s a Downpipe and Why Would I Want One?
What’s a Downpipe?
Technically, the “downpipe” section of an exhaust system connects the headers or exhaust manifold to the catalytic converter(s). For most vehicles, the downpipe section is essentially incorporated with the catalytic converter section, and since there’s very little performance or fuel economy benefit to replacing a modern catalytic converter (they’re just not that restrictive), most vehicle downpipes are never given much thought.
However, on a vehicle equipped with a turbocharger, an after-market downpipe can offer a significant improvement in performance. Because a turbocharger is essentially a pump, it’s important for the pipes entering and exiting the turbo to have unrestricted airflow. On many turbocharged vehicles, the exhaust pipes coming in and out of the turbo contain numerous bends. If these pipes are bent using a cheap, crush bending process (a common situation for many vehicles), they can restrict exhaust gas flow in and/or out of the turbo.
By reducing exhaust gas restrictions, the turbocharger can spool up more quickly. Faster spool-up times mean more power and/or better fuel economy. As a result, many after-market exhaust manufacturers offer over-sized exhaust downpipes with mandrel bends.
Why Would I Buy A Downpipe?
You might want to buy an after-market downpipe if:
- The exhaust piping leading in and out of your turbocharger contains numerous bends. Some vehicles – like large turb0-diesel trucks – have enough room in the engine bay for fairly straight exhaust tubing. Smaller vehicles can have a lot less room in the engine bay and therefore more pipe bends.
- You’ve modified your turbo to run at a higher boost pressure. Some turbocharged vehicles come with a well-designed turbo exhaust system, and in these cases there is very little to gain by adding a new downpipe. However, if you increase the amount of boost on the stock turbo, you may find the increased exhaust gas output demands a larger, smoother downpipe.
- The after-market downpipe is proven to improve performance. Most after-market downpipes are both mandrel-bend and larger in diameter than the stock units they replace. Therefore, they can significantly reduce restrictions and make fairly dramatic improvements in horsepower. Adding a downpipe to an older Subaru WRX exhaust system, for example, can add as much as 40hp all by itself.
Subara WRX’s aren’t the only types of vehicles that benefit from downpipes. Despite having fairly efficient and well-laid out turbo exhaust systems, many late-model diesel pickup owners can add 10-20 hp with nothing more than a new downpipe.
Bottom Line: If you own a turbo-charged vehicle, it’s wise to research your downpipe options. Just be sure that you see a dyno test demonstrating a significant performance improvement before you buy.
I have a Nissan GTR and was wondering should I even bother with getting a downpipe?
Cedric – The GT-R is basically a factory built race car. The engineers at Nissan have worked hard to perfect the vehicle’s performance without sacrificing reliability, drivability, etc.
I have no doubt that bolting on an after-market downpipe could increase peak horsepower…but I wonder if the after-market unit would offer the same all-around performance as the factory unit.
If we were talking about a mass-market turbocharged vehicle, an after-market downpipe is probably a fine idea. But in this particular case, I wouldn’t recommend it…at least not unless it’s backed with a great dyno chart and it’s been tested/used in a race setting.
Personally, I don’t think I’d touch a GT-R. That car’s just about perfect. 🙂
YES! Down-pipe for GT-R Is highly Recommended! Pain to install though.
good article. Ghouls I saw the same manufacture for the turbo outlet pipe or does that make a difference?
Any recommendations for the 2018 Civic Type R?
I have a focus St would i get any bhp gains by adding a downpipe ?already has a decat
Junior – Yes! After-market kits for the ST offer downpipes, upgraded exhausts, upgraded intakes, tuning, etc. LOTS of stuff you can do. Check out COBB and Steeda, to name two.
Just got a 2015 Focus ST, would you still recommend a turbo downpipe and catback?
Robert – I’d recommend a package from someone like Steeda.
Awesome! Thanks.
I have a vw kombi TDI can I fit downpipe on it?
I have a 2014 Audi A5. I want to make it louder…any suggestions? It is a lease, so I have to get it back to stock when i return the car, so I would just like to keep that in mind as well!
Amar – Buy a muffler, something sized for your vehicle. You can keep the OE muffler and re-install it when the lease ends. You can also invest in some electric cut-outs, but that might be too much noise.
What about a BMW M4? Twin turbo but already has a pretty good stock exhaust. Would you upgrade the downpipes ? I have Dinan tune on it so it has higher boost. I am just worried about it going into limp mode.
Ryan – Downpipe upgrades are a huge source of power for most vehicles. Check out EuroSportTuning.com – they’ve got a good selection of parts.
I have a Lancer ex GT-A 2010 model, is it right to put a downpipe? I want to make it louder, i already installed a muffler. I have no turbo tho.
Dustin – Can’t have a downpipe without a turbo. 🙂
I have a 2015 Subaru Forester XT. What kind of increase from a performance aftermarket downpipe would you say I’d see?
Joe – 10-20hp, 10-20 lb-ft of torque. If you combine it with a tuner, you might enjoy an extra 40-50 hp.
I’m picking up my ’15 Evo x in about a week and i was wondering if a downpipe is a good idea for it. Once my finances even out after purchasing my new baby, id like to start tuning her. I’m headstrong on an ETS V2 exhaust and was wondering if its crucial to purchase a D/P along with it? if so, what are some companies you’d recommend?
Joe – Don’t have any recommendations for a company, but downpipes are generally a great investment for turbocharged cars, especially if they’re combined with a programmer that has a tune sepcific for your downpipe.
I’d suggest finding a tuner, then figuring out what downpipes they have tunes for, and buying a downpipe that way.
2005 GTI, would a 60mm down pipe upgrade be a good idea for an otherwise stock car?
Oliver – Maybe. What’s the dyno chart look like from the downpipe manufacturer? Do they offer any claims and documentation?
A downpipe would really only be a benefit with a tune. An APR stage II plus the downpipe would give you a really nice gain without having to upgrade the stock turbo/intercooler/engine mounts/tires etc.
I’m running a stage I with just an intake and the performance gain made it feel the way it should have been from the factory. I’m getting the DP and stage II flash in the next couple weeks. Dyno charts and plenty of youtube vids puts it quite comfortably faster than Mazda 3 Speeds and Focus ST’s for a really reasonable price.
Great article, great for someone new to cars. I have a 2010 BMW 535i x drive and am looking to add some efficiency to the turbo/engine through the exhaust. I checked out Eurosport Tuning you suggested earlier, but couldn’t find what I think I am looking for. Any suggestions you may have for that, or any other mods for this model would be great. Thanks 🙂
Daniel – Beyond EuroSport Tuning, my best advice is to Google “BMW 5-series mods” and look for parts that have performance claims supported with dyno tests.
Hi. I have a c250 petrol 2010 model. I’ve had a look at a few downpipes, but they they say they aren’t road legal? Any how, I’m thinking of upgrading the exhaust system. What benefits would I get home both of these? And it there anything else you’d recommend?
James – A lot of after-market parts are listed as “off-road only”, as doing so reduces the regulatory requirements associated with selling the parts. However, they’re fine for all use (only a visual inspection of your exhaust could cause you to fail an inspection…or not. visuals are kind of rare).
I have no recommendations, but since you’re a Volvo owner, I know EuroSportTuning.com has a bunch of stuff.
I have a 2.8L turbo-diesel Chevy Colorado, which i notice the design of the downpipe design is straight with minimal bends on each ends. By upgrading to a larger diameter downpipe with fairly same design as stock guarantees a noticeable response or gain in performance of my truck? thanks
Azri – Cool truck! We haven’t gotten those yet.
Diesels generally respond best to tuners…the factory tends to tune them conservatively to minimize EGTs, but if you’re willing to roll the dice a little a tuner is really all you need. I don’t think you want to mess with the downpipe unless it’s part of a kit.
Keep an eye on the products offered by Banks Tuning for the new Colorado…they’re diesel wizards. ATS is another company I’d monitor, as they have lots of parts for diesels.
I have 2013 juke nismo. Installed an injen cold air intake. Had turbo manually increased a couple lbs. cat back exhaust. Next I was wanting injen intercooler pipes and turbo downpipe. Think that will do a lot for a little more hp? Also want to get some lowering springs. On the fence about a throttle body spacer. Any feedback on any of this would be very appreciated. Also any suggestions. Thanks Mike.
Mike – Throttlebody spacer is a gimmick. Don’t bother.
The downpipe and upgraded intercooler can make a difference, but it’s all about the tuner…what brand of engine tuner do you have installed, and what tunes does that manufacturer offer for the mods you want to make? Answer that question and you’ll know what’s worth buying.
Thanks a lot for your returned email! I’ve already installed a downpipe, so no question there. As far as tuner, to tell you the truth a May have bought a gimmick already. Think it’s called a jdm stage 3? That plugs into cpu port under dash. I have contacted cputek, been given a quote for cpu upgrade. Would have already got it but it’s expensive. Any input on that? Thanks!
Mike – Nothing specific, other than to say you should require dyno proof before you buy. 😉
Thanks Jason, it’s cool that you help newbies like myself.
Mike – I like that it’s expensive – most of the good tuners are. 🙂
CPUTek isn’t a name I know, however.
Hi Jason, misinformed you months ago on name of flash. It’s ECUTEK. Anyway still plan on getting one when I get funds together. They send a disk (I think) and download from laptop. Have to buy a license for it. (?) Question today is. If I get ecu flash should I go back to standard turbo boost? Thanks man!
Mike – Replied to your email.
Just wondering what type of down pipe I should use? And how much hp gain I could see, I have a 2013 Hyundai Veloster turbo
jordan – you could be looking at a little gain of 10 – 20 hp from some after market down pipes
Jordan – Whichever downpipe you can get that has dyno sheets to prove that it works. My guess is that you’re looking at one or two options once you require a dyno chart…
But, like I always say, find an engine tuner first, then see what downpipe brands they have tunes for.
I just bought a 2015 Audi s-8( twin turbo) and am installing an APR ecu,and a Meistershaft exhaust system. Will downpipes be worth the extra costs($ 1,700 or thereabouts)? Will the down pipes be significantly louder? The exhaust system will have electronically controlled valves .
Byron – In terms of being worth the cost? I don’t know. Usually they’re good for 20hp (or so), but on that vehicle they might do a little better.
The downpipe won’t have a noticeable impact on sound, so that’s not a reason to get them (or not get them). Sounds like a fun car, BTW. Too bad street races are so hard to arrange at the country club, LOL. 🙂
Hahahahaha
Hi there,
I’m thinking about getting into tuning as a hobby. I’m not planning to race seriously or anything, but I do like to go fast. Right now I’m looking at a 2010 VW GTi and I wanted to know what are the best upgrades to go for while keeping my spending in check.
I figured the exhaust, intake and coil-overs are the places to start (feel free to correct me if I’m wrong), but I wanted to know how much would I gain from a new down pipe if i’m not planning on upgrading the turbo anytime soon.
Thanks,
GTi Fan
GTI-Fan – Generally, modern cars benefit from the following:
– engine tunes
– exhaust and air intake kits
– downpipes (if they’re turbo’d)
and then from there we start talking about things like upgraded turbochargers, over-sized injectors, water-methanol/nitrous (again, if turbo’d), and then engine swaps.
If it was me, I’d find a Golf R (assuming they offered one in 2010) and start there. You can probably go pretty crazy just modifying the turbo on that car…
What about an Audi s5? Good idea to get an after market downside?
Why not? There’s nothing unique to an S5 that makes them a good or bad idea. The trick is to buy a good one, and as I like to say, any company selling performance parts needs to prove their product works on a dyno.
Hi there
I currently drive a polo gti 6R ,l was wonder how would my car sound like if l had to put a downpipe and would it gain any power.
Cyprian – Gain power? Yes. Sound different? Probably not.
would I notice a difference in performance and sound with a downpipe and decat on my golf 6 1.4 tsi
I have a 1.4 Fiat Punto turbo…will a downpipe do any good? looking to make my car sound and look better. Any advice on mods i can do will be appreciated.
Yaseen – A downpipe can’t hurt, but I would advise you to look for a performance kit that includes a tuner, intake, exhaust, etc. Small engines like this don’t benefit as much from one component…you want a package.
I’m looking at purchasing a 2009 Volvo C30 R. I already have an S60 R with a performance downpipe and notice a big difference. Do you know of there’s any options or how much power I would get out of the C30?
PattyA14 – Sorry, not much help on Volvo stuff. EuroSport Tuning has lots of Volvo parts, and Frank (the guy that runs the site) knows what’s up. Give them a call or email.
Hi Jason,
Excellent article and very informative indeed. I’m driving a Mazda 6 MPS (European version of Mazdaspeed 6). But, planning to replace it with 2004-2007 reg BMW 120d M sport since 2007-2010 apparently have had lots of engine related issues.
What mods will get the 120d from 177 bhp to about 220 bhp? The Mazda 6 has very soft suspension and too big, don’t feel nippy at all. Mazda also suffers from blown engine due to weak VVT actuator and chain issue.
Any suggest is much appreciated.
Mr. T – If you want to increase horsepower 30%, you’re looking at adding forced induction. Both turbochargers and superchargers increase output roughly 30% (sometimes more, sometimes less).
If the vehicle already has a turbocharger, than you’re looking at some sort of turbo upgrade. Dinan makes all kinds of stuff for BMWs..I’d probably go see what they had in a turbo or supercharger.
Excellent tip Jason, thank you so much. I have decided to keep the Mazdaspeed 6. Thinking of buying JBR Power Path Stage 2 Short Ram Intake with Turbo Inlet Pipe and Autotech High Pressure Fuel Pump now.
Hopefully the forced inductions will give the horse power from 256 to about 300!
do you recomand downpipe and race exhust system for giulietta qv ?
Just bought a ’15 Civic SI coupe, I just wanted to do a downpipe and a tune, are there brands you can recommend? Would it be better if I bought a full exhaust system? (does that include a downpipe?) Im a noob, thanks
did you go through with this?
What are your thoughts for a 2015 Civic SI Sedan? Ive seen you reply to almost all the other cars except the Civics. Any particular reasons? Your opinions are appreciated! thanks
gee – I like Civics quite a bit. I just don’t typically respond to questions like “how much will I gain”, because it depends on the parts installed. There are lots of aftermarket parts for Civics, particularly from the 90’s and early 2000’s. I’d go that route if I was building a fast 4-banger.
I have a C300 2015 i4 Turbo charged. DO u think i should downpipe and does it increase much horsepower?
Kevin – Certainly possible, only I’m not sure anyone makes a good kit for the C300…it’s hard to find performance parts for brand new M-B models.
Hey I’m sorry this is so much later but I recently got a ’15 EcoBoost Mustang and I was wondering if you think I should get a catted downpipe for it?
Patrick – You’ll see some more power that way, but I’d suggest looking at one of the many “stage” kits. A combination of a downpipe, tuner, and intake should be good for quite a few horsepower.
I have a 2014 genesis 2.0t how much performance would I gain if I decide to put an Isis Down Pipe? I already have a cat back and AEM cold air intake.
Ryan – Downpipes are usually good for 10-25hp.
I own a Mini Cooper S. Was wondering if a downpipe would add more bhp to my car.
Zaahir – Is it turbocharged? Did you read the post?
I have a 2014 BMW 335i. Twin-turbo pushing 225kw and 400nm torque at 1200rpm min. Would you recommend getting down-pipes ? what power increase would there be and any increase in sound ? ….What product brand is recommended as well ?
John – Downpipes are usually a good idea for turbocharged vehicles, as the OEM downpipes often limit performance for emissions reasons. Power increase can be just a few HP up to 50hp, depending on vehicle (your vehicle is probably only going to gain a few HP). There may be a difference in sound, but I’m not sure.
As for brands, my advice is to shop EuroSportTuning.com – the guy that runs that site knows what he’s doing and only sells kits that make sense. Whatever they have available is what I’d look at.
I have a BMW X5 3.0D would it increases my fuel economy and horse power, if so by how much do you think
Sandeep – The answer is too look at the specs given by the downpipe manufacturer. Most will share a dyno chart. I don’t believe you’ll see much in terms of fuel savings, but you should see a 10-40hp gain. You’ll also enjoy slightly snappier turbo response.
I have a Cla250 v4 with a turbo. I already did a resonator delete. But I want it to sound a bit more aggressive. Would an aftermarket downpipe be good to the sound increase?
David – First, don’t say V4. That’s not a thing, unless you’ve got some 60’s era European car or a motorcycle.
Second, downpipes don’t change the sound of the engine much, at least for everyone else. You may notice a different sound at WOT, but it depends.
I have an 85 Buick ttype turbo would a down pipe be useful nd how so
msdoll – Probably. Look at the dyno chart from the company selling the downpipe.
Need some advice…I got a golf 5 gti fsi 07 I’m installing a downpipe this weekend however I was advised that the EPC light might come on should I be concerned?
Ash – If you reflash the ECM to be compatible with your new downpip, you shouldn’t have any trouble.
When adding a downpipe to a turbo engine do you also need to add an after market exhaust to benefit? Would an axle back exhaust and a downpipe add hp? I have a 2013 BMW 328 with M-performance exhaust (axle back).
Thanks
Corey – No, an after-market exhaust isn’t required. Also, if youv’e got the M exhaust system, don’t touch it. Nothing you can do will make it better.
Any experience with a down pipe on a mini cooper S Turbo?
Thanx
Dean
No – sorry.
great post firstly
i recently bought a golf 7 GTI
I’ve been researching intake systems exhaust systems and downpipes
could you recommend any particular brands that work well 7gti’s
looking for great quality and extreme performance
THANKS
No. EuroSportTuning is the company to talk to if you have a VW.
i just bought a 2005 G35 an was wondering if i should buy an after market downpipe to it, and i also eanted to what exacly it would to it.. would it give it more sound? more hp? or wha
Gabriel – It makes your car go faster. How about reading the article before you comment next time?
Jason you seem pretty knowledgeable that is why I’m writing this very XLT but with the new aluminum yes I know there are pros and cons but with it being so light I decided to make performance upgrades. I installed a high performance Rauch cold air intake I can honestly say it made a huge difference. I also installed and an MBRP High-performance exhaust it’s the solid black 2.5 inch dual cat back that comes out the back with 3.5 inch pipes I really do love it there is definitely a noticeable power upgrade and the sound is great it sounds good but not overly obnoxious. I am not familiar with programmers and tuners you seem to be but with these high-tech engines nowadays and the computer systems and tuners already in them I was afraid to mess with that so instead I got a 85 MM BBK throttle body high performance and I will tell you with The three of those Enhancements I know I’m getting somewhere between 30 and 50 hp. I would like to get your opinion on all this please feel free to criticize also your thoughts on a tuner and programmer for such a high tech engine and new engine thank you for your time I’m looking forward to hearing back from you and if you have any other ideas please feel free to share the only issue is I don’t want to buck my warranty and I’m almost positive that A tuner or programmer will it has a Lund grill guard with an LED strip and it’s a sharp looking truck I’m just not interested in putting headers on it or cylinder heads that’s just getting too much into technicalities I’d rather just focus on the airflow I try to tell people that want to make upgrades I think that is the easiest way to go to many people mess with the engine when all you have to do is find out all the ways you can to make your engine breathe better and you’re going to have noticeable results. With the and Hansons I made there’s definitely a noticeable improvement in acceleration but my mid range power is unbelievable as it was when it was stock as well. Will my trucks computer and tuner automatically adjust to these enhancements is another question I have I was told that it would. The only other question that I have lol is what are your thoughts on a high performance catalytic converter because that can make the biggest difference out of anything but with today’s emissions regulations I don’t know about it I was pricing them on line I’m on the fence about it I’d like your opinion Any other suggestions or ideas please let me know Jason thank you
Matt – First, thanks.
Second, going in reverse order:
a) High-flow catalytic converters only make sense when you’re supercharging or turbocharging something. Contrary to popular belief, modern catalytic converters aren’t constrictive whatsoever.
b) A tuner won’t impact your vehicle in a negative way, and I’d encourage you to shop for them on AutoAnything.com to see what’s available. All you have to do is plug them into the vehicle diagnostic port, let them run their magic, and gain substantial power.
c) I’m a bit surprised that the throttle body upgrade made much difference, but I don’t know the size of the unit you replaced. If you can get more air into the engine, good things happen. As for the air intake and exhaust, they sound like good pieces…only I worry the exhaust might be too big. I’m not sure what engine you have, so I can’t be certain.
The factory throttle body was a 57mm I got a bbk 85 mm…exhaust will fit fine it’s an MBRP cat back solid Black 2.5 inch pipes resonator and muffler dual exhaust…do you think I should get high peformance headers? And a throttle body spacer I found one that fits the bbk? Please shoot it to me straight cause I really don’t know the throttle body spacer I’m leaning no….can’t wait to get your opinion…please explain a little more about a tuner I looked at a 600$ called Diablo….problem is I heard they ruin your warranty and Lower the life of ur engine let me know bud?
Engine is a 5.0 v8 coyote 385 hp 387 torque.
Matt – Throttle body spacers don’t do anything on a modern fuel injected vehicle. In the old carbureted days, a spacer between the carb and the intake manifold was a good add (depending on how your carb was tuned). In the days of throttle body injection (earliest fuel injection days), it may or may not have been impactful (depends on the vehicle). But today, a little bit of extra air space between the throttle body and X isn’t going to matter.
As for engine tuners, they essentially overwrite the factory fuel map. The OEM fuel map will call for X amount of fuel when Y = this and Z = that. The OEM fuel maps are designed to offer a good balance between performance, fuel efficiency, and emissions. If your over-write them with a fuel map that is more aggressive, you’ll trade some emissions and lose a bit of fuel efficiency (in some scenarios) in exchange for sizable horsepower increases.
If someone tells you that one of these tuners can void a warranty, they are misinformed and probably working for a dealership. Dealers often parrot this line, because it’s the easiest way to discourage performance enthusiasts from visiting a dealership’s shop.
Don’t believe it.
Thanks for all your help Jason sincerely
i have a 2007 chevy silverado 3500 dually diesel all stock would a down pipe do any thing for my truck
Bill – Yes. Read the article. Look for a downpipe that offers dyno proof.
i found a down pipe with dyno test it is wrapped with heat tape is there any advantage to that
Bill – Perhaps. The tape usually exists to protect other components from the heat the pipe puts out, so my guess is that it makes no difference performance wise.
Hey!
I have a 2015 Subaru Forester xt with a cobb accessport running the stage 1 93 oct map. I’ve recently installed a Nameless Performance cat back exhaust system. I’m considering installing a Nameless Performance downpipe with which I’d get a custom pro tune. What kind of hp/trq gains would you expect to see over where I am now?
JT – Hard to say. 20hp seems like a good round number.
Do you think adding a Cold Air Intake like an AEM would be beneficial to the setup I previously mentioned? I imagine that since I’ve reduced the exhaust restrictions as much as I can it would help to get more air into the engine?
Probably a little bit. Turbocharged vehicles probably won’t benefit as much as NA, but freer breathing is freer breathing.
I have a 2015 Mustang EcoBoost. How much of a difference will it make if I get an aftermarket downpipe?
Singh – What does the company that sells the downpipe say? Do they provide proof of some kind (like a dyno chart)?
There are lots of companies selling kits for EcoBoost engines, and I’m sure there’s a kit for your Stang. But you need to research the kits that are available for yourself. They’re not all the same.
I have a 2006 Subaru Liberty 2.5i (Legacy for those outside AUS.)
Would it be worth upgrading to a high flow catalytic converter, aftermarket fuel pump and larger down pipe?
I really would like better performance out of the car but am struggling to think what else I can do to improve performance keeping in mind I wish to keep the car naturally aspirated.
Mike – Generally, high flow catalytic converters are only necessary when you add a supercharger or turbocharger to an engine that was naturally aspirated. Also, downpipes are only found on turbocharged vehicles.
If you want to increase the power of your 2.5L, you want to look at an air intake, an exhaust kit, and an engine tuner/programmer.
Finally, fuel system upgrades like larger injectors and high perf. fuel pumps tend to make very small differences on street cars. I wouldn’t mess with any of it unless you decide to add a turbo.
I have a 2015 Ford Focus Ecoboost and I wanted to do some minor upgrades to get a little more power out of it. What would you recommend?
I have an 08 mazdaspeed 3, have a cobb v3 accessport with a front mount cp-e intercooler system. I am planning on getting an after market exhaust and downpipe, was wondering which you recommend getting first and how much on average the hp gain would be.
Richard – No recommendation beyond Flowmaster, Borla, or Magnaflow.
Have a 2012 Audi A3. 2.0 L Trying to get it tuned but having computer issues…How much would a down-pipe help?
I have 435i bmw replacing the downpipe will it make a difference in performance
Tony – Probably. See the comment I left Brett.
Toyota JZX90 1JZ-GTE? worth adding aftermarket downpipe?
Brett – Probably. Depends on the pipe. My standard advice is to find one that comes with dyno charts to show how much power it adds (and where).
Thanks. Apparently the stock ceramic twin turbos can safely take up to 14psi. Stock is 8psi. Ive changed the air intake and de-catted and big diameter exhaust – its now boosting to 12psi. When i look at the skinny downpipe in front of my 3in decat pipe it makes me want to upgrade it. I will do more research. It seems theres a Japanese made apexi item that will bolt in.
i have a nissan 300 zx twin turbo and i was wondering if a down pipe would actuality help with my peak HP
Miles – Probably. See previous comments.
I have a 2007 bmw 328i i want to make it louder..
Any suggestions ..?
Pamela – New muffler?
I have a 2016 wrx. would a downpipe benefit me if i do not upgrade anything else at this moment in time?
Gregg – Yes.
Hi I have a Subaru Forester 2015 xt what kind of downpipe kit do you recommend me for improve hp, if you give me a brand and type you will be helping me a lot thanks
DC – I don’t recommend a brand – it depends on the vehicle, and there are a lot of options. See the other comments.
Hi i am looking at getting a new 3″ performance downpipe with flex for my 2013 Hyundai Santa fe 2.0t.
Would i need to tune my car? how much hp could i gain?
And i was also looking at replacing the cat with a tube made to replace. both parts are for the same engine genesis coupes.
Jonathan – Don’t know how much hp you will gain. I’d suggest asking the company that sells the downpipe for a dyno chart showing the improvement. As for tuning, it’s a good idea.
Replacing the cat+the downpipe all together isn’t a bad idea. However, most cats aren’t very restrictive these days…unless you’re increasing the boost level, I’d say that the OEM cat is fine.
Hi,
I drive a 2.0T Audi A4 and was looking for a mod to increase the volume of the exhaust and also a little bit in power but more for sound improvements
Any recommendations?
Thanks
Carlos – Most 2.0T Audi owners find that a tuner, intake, downpipe, and exhaust all add power. You might check out some of the performance packages that are available too. I like EuroSportTuning.com, but there are other sites that sell this stuff too.
I have an 08 Legacy GT. The first cat was failing and went with an Invidia catless downpipe. I don’t know what HP gain I got from that, but with a Dyno tune… I went from 237.6ft-lb of torque and 215.6Hp at 4950 RPM to 257.5 ft-lb of torque and 237.2 Hp @5250 RPM.
i am in the process of changing my exhaust to a brand called miltek from uk. are they popular for their quality and design
Karim – Yes. That’s a well-known brand name.
Hi i have a 2016 polo gti 6R 6speed manual, i would like to find out what modifications can i add to make the exhaust sound more louder.any suggestions?
Raymond – Upgraded muffler. Cat-back exhaust.
Hello Jason,
I bought a 2007 Subaru Liberty GT wagon a few months ago completely stock. (I believe the ej255 engine is brilliant, it just needs to breathe)
So far I’ve purchased a new silicone intake and MAF Pipe. The plan is to replace the up pipe with a catless pipe as it has a second cat further down the system. I was also considering replacing the down pipe, until reading this article of course… ? now I intend to.
I don’t want it too noisy so I’d be hesitant to replace anything else. I’m open to suggestions on this.
Once this is complete, I will be getting it tuned. First time I’ve seen the term ‘tuner’ before, I’m guessing it’s a kind of ‘off the shelf tune’ software plug-in, whereas tuning at a shop with a Dyno is more of a calibrated approach?
Would you mind recommending which direction on tuning I should go for this, I wouldn’t know where to start.
Thank you for your time,
Graham
Graham – I don’t have any specific suggestions, but I’m not wild about going to a tuning shop unless you’ve got a really unique setup. Instead, you should buy a tuner that’s compatible with your vehicle – COBB Tuning has some good options – and then talk to them about a custom map for your setup.
Hey guys I have a 118d Msport. Already remapped to roughly 170hp. Was wondering if a downpipe is worth getting?
I have a 2015 Chevy Malibu ls 2.5l eco…. I put an exhaust and cold air intake…. Would a down pipe/front pipe make my car faster (more horsepower)?? I also installed the turbunator fan inside the air intake and a remapping tuner chip…. Thanx!
Phillip – I wasn’t aware that the 2.5L had a turbo.
I have alfa romeo mito tb 120hp and I have 2 questions: 1)Will I get some hp increase and sound? 2) will the check engine light open If I put aftermarket downpipe? I think if I change it my car will be decat right?
Vagg – In order:
1. Maybe. Depends on what system you add. Sound is all but certain, hp is going to depend on the quality of the system.
2. Maybe. If the pipe is correctly designed, and/or installed by someone that knows how to re-tune the engine, it shouldn’t be a problem.
BMW M2 and Downpipe..
Hi Jason, I’m picking up an M2 F87 next week. Would you recommend the downpipe?
Azhar
Azhar – Sorry, I don’t have a recommendation. My advice is to only look at parts that have proven dyno performance.
FivestarMotorsport.com is probably a good resource for you as well. Talk to Chris – I’m sure he’ll help you out.
I have a 15′ sl63 with a ecu upgrade from Renntech. I’ve been thinking abut doing the next thing. After speaking to a few different companies I’m confused so I’m glad you have this forum so I can get independent input. One of the companies says to the muffler because it offers more horsepower than the down pipes with a 200 Cell. The other one says this makes no sense; downpipes will give much more power increase.
Sean – When you’ve got a high-end car like an SL63, the normal rules don’t really apply.
First, understand that a lot of the addons and accessories available for your car will probably set a check engine light. High end cars are notoriously finicky, so you really need to talk to someone who knows your vehicle.
Second, it’s usually best to buy a package of parts at once rather than go one piece at a time. This way, you can make sure all the parts play well together.
My advice: Talk to Chris at Fivestar Motorsport (http://fivestarmotorsport.com/). He’s very experienced with high-end cars, and he knows all the options on the market. He can tell you what to buy, and he can give you a good deal too.
Thank you. I will do this.
I Just bought a 2002 gti mk4 and it already has a few things like catch can bov and a turbo back exhaust should i buy an aftermarket turbo downpipe? If so what kind?
aiden – A downpipe can be a great add-on, and as far as brand I don’t have a strong recommendation. I’d suggest emailing or calling EuroSportTuning.com. They are VAG experts.
I have. Ecoboost 2016 mustang ive done some onterior done like intercooler, intake, bama tunning, and have this thing called pedalmax on my car but ive been reccomended alot to install the downpipe on my car but id want to know how much hp it would go up if i did and what kind would best fit my type of car, and also are their any effects that can be caused?…. Thanks
Adrian – A downpipe is usually good for 20hp (sometimes more, sometimes less). The downsides are cost, emissions (your car might not be compliant any longer), and the chance that you’ll have to deal with check engine lights (depends on what kind you get).
I’d advise going with a unit from a well-known company like Cobb tuning. It’s not the cheapest option on the market, but they’re a real manufacturer with engineering, testing, etc. The quality is good.
I have a Opel Corsa GS-line 1.2 turbo benzine from 2020. Gain i some hp with a down pipe?
How much do you reckon it’ll cost me to get a downpipe fitted on a abarth punto grande and how much bhp do you think it will add on to it?. Thanks
Jack – Don’t buy a downpipe unless the manufacturer provides a HP increase estimate and a dyno chart.
Also, I’d suggest looking for a kit that includes a tuner along with a downpipe. Downpipes usually require a custom tune.
or you could just buy an AMG and all your problems will fly away.
I have a 2011 Genesis coupe 2.0t stock, is there anything else I’d have to modify or change if I buy a downpipe
Nate – Depends on the downpipe you buy, but generally speaking you don’t want to add a downpipe without having an engine tuner (or getting the engine tuned by a pro).
I have a 3.2 Audi A5 and I installed a AWE track edition exhaust. Love the way it sounds but I want more. I’ve heard of removing the downpipe but not sure if that’s correct. What are my options for more hp and aggressive sound ?
Chris – My concern with removing the downpipe is that the turbo is almost certainly going to run hotter. It might burn up much sooner than expected.
Of course, if you were looking for a good reason to replace the turbo anyways, premature failure isn’t a big ideal. But it you don’t want to worry about the turbo failing, I’d suggest leaving a downpipe in place.
Having said all of that, talk to EuroSportTuning.com. Frank knows an encyclopedia more about VAG cars than I do.
Hi Jason, i have a hyundai tuscani 2.7 v6. Would you recommend the downpipe? Thanks, Great Article btw
Kanda – Unless you’ve bolted a turbocharger onto your 2.7L Tuscani, I do not recommend a downpipe. 🙂
I own a 2016 audi a5 35tfsi if i put a down pipe how many horsepower do i gain ?
Emmanuel – See the other comments here asking the same question. HP is going to vary by the pipe, look for a dyno chart, talk to Frank at EuroSportTuning, etc.
I just bought a 2016 all wheel drive 2.0 turbo infinity q50. I don’t have exhaust and my cold air intake will be here any day along with an upgraded computer system. Would getting down pipes be a large gain or will it be minimal without an exhaust system?
Hi I bought a hyundai veloster street turbo and was wondering what I can do to get the best performance and economy wise from my car
Sorry 2016 model
I have a 2006 Subaru Outback xt what kinds of gains could I get out of a Dow pipe?
Hi
Thinking of installing a downpipe to a 435i model 2014. Currently have bmw software upgrade. How much power would gain from the downpipe.
S – What downpipe are you buying? What tuner do you have? Is there a custom tune available for your vehicle with a downpipe to match the one you bought?
If you’re looking for a rough number, figure 20hp. If you’re looking for the exact figure, you’ll need to contact all the companies involved and ask them.
I have 86 Corolla 1.6 efi. Should I get a downpiping installed?
Sunny – Probably not, unless your Corolla has a turbocharger that I don’t know about.
No it doesn’t. Thanks
I have a 2016 Hyundai Sonota sport 2.0t what will be my gains if I purchase a aftermarket downpipe? I already have a exhaust system & aem cold air intake & throttle body spacer…. thank you in advanced I hope I could get a clear answer the downpipe will be my next big purchase
Juan – Usually a downpipe is good for 10-20hp, but it can be quite a bit more on some applications. I’d suggest looking for an aftermarket unit that comes with a dyno chart.
I have a 2010 Hyundai Genesis 2.0t.. would buying an aftermarket downpipe to make it louder/increase hp be a good decision?
Ashley – A downpipe will probably make your engine sound a little throatier under hard acceleration, but most people like that. It would definitely boost horsepower, only the amount varies based on the pipe and your vehicle.
My suggestion would be to invest in a programmer first, and to make sure the programmer has a compatible tune for whatever downpipe/exhaust upgrade you decide to make. That will help you get the most bang for the buck.
Morning Jason and all, I have golf six gti manual, this car was fitted downpipes, the car is misfiring, loosing power, engine light on, black smoke behind, I’ve changed minicat, replaced plugs, cleared faults, VW claim that my turbo is fine, who can help me out pls inbox me on my email. Thanks
Papi – No idea. Internet diagnosis is hard. My guess is that it has something to do with oxygen sensors, but that is merely a guess.
Hey Jason. I recently got a JCW Mini 2011 (211hp) with the N14 engine (less pops and burbles).
I wonder if an aftermarket downpipe would give me a few more hp and also nice pops and burbles,
Sergio – Definitely more hp, maybe not on the pops and burbles…only it will sound nicer at wide open throttle for sure.
I have a car but I think there’s no turbocharger ? I just got 2008 Mitsubishi lancer es from my brother and I want to change the exhaust system, should I get the downpipe as well ?
Pete – If you don’t have a turbo, you don’t need a downpipe.
I have a 2009 335i, would you recommend downpipes and about how much ho would I gain
Venoy – I’m sure there’s a kit out there that would increase power on your 335i with a combination of a downpipe, tuner, intake, and perhaps some oversized injectors. My advice is to look for a combo performance kit.
If you just want a downpipe, look for one that comes with a dyno chart showing the expected performance increase. Usually, they add 10-20hp by themselves.
I have a 2011 F150 Platnium with the EcoBoost (turbo). I have been reading that changing the down pipe to a catless version may clear a P0430 code I am experiencing. Do you feel this is correct? The entire engine and exhaust is stock and the code appeared about 4 months ago and has been coming on and off with the engine light.
Mike – I don’t know specifically about that P0430 code, but it sounds like something related to an emissions system error. However, generally speaking, removing a catalytic converter doesn’t solve emissions problems. It can also make your vehicle less likely to pass a smog test.
Unless you want a downpipe to save power, there are some ‘cheater’ adapters that can trick O2 sensors into reading “OK” even when the cat isn’t working. That might be the cheapest way to get that code cleared. Just understand that it might not be legal in your state. 🙂
Hi Jason, I have a 2016 Nissan Patrol (Hardtop – 2door) 4.8L V6 (280bhp) WITHOUT Turbo… but would still like to get some extra punch. Do you think a Cold-Air intake and ECU remap would be enough? Or do you suggest entertaining the idea of Headers and Cat-back exhaust (with stock muffler for legalities) ?? Or do you suggest something completely different? 🙂
Yasser – Yes – an ECU remap is usually good for 20hp or so, and a cold air intake will give you a little more. Throw an exhaust in (or maybe just a muffler upgrade) and you’ll have something that’s a little faster than stock.
I have an E63s 2014 Amg.
My factory warranty is up and I want to make the exhaust louder. I wanted to know which one is better:
-Meisterschaft
-FI Exhaust
-Renntech
-Alpha AMS
What will downpipes do for me in this instance?
Sam faz – I don’t have any opinion on these brands, all I advise is that you buy a kit that comes with proven performance via dyno testing. Most companies will provide a sample dyno test along with their product – if you can’t see one of these dyno charts from the manufacturer, I wouldn’t buy.
Also, downpipes are always good for more power on a turbo. However, since you have the AMG package, I’d guess that you don’t need to spend money on a downpipe. I’m not sure you need to spend on an exhaust either, to be honest. They come pretty fast out of the box.
I have a 2014 535i msport bmw twin turbo. I’m looking to change the down pipe but not sure what to go with. I love the sound of the turbo spooling and also want to hear the blow off so I’m sure gonna have to change that as well. What type of set up would you recommend?
Nick – I’d suggest contacting EuroSportTuning.com and asking for Frank. He knows all about the European stuff, which brand(s) are best, etc.
i have a polo tsi an i want to put downpipe
is it a wise choice?
2017 WRX. I just purchased the car and was thinking of doing this first. Any idea of the gains?
Nick – If you go with a whole setup that includes a new downpipe, I bet you could pick up 20-30 hp. If you just do an axle back, 5-10hp.
I have a jdm 1997 subaru forester. What kind of gains can I expect if I put an aftermarket downpipe?
Lawrenson – Cool! 10-20hp, give or take. Most downpipe manufacturers will provide dyno charts to show sample gains.
The real trick is to combine a downpipe with an intake, a new exhaust, and a tuner…that’s good for 50-75hp when it’s all said and done. Upgraded turbo works too – Cobb has some cool stuff.
Hello. Recently bought a used Alfa 159 2012 – 1.8turbo. Please advise what downpipe you would recommend and where to purchase one? Thanks for your time
Michael – Sorry, no idea. Look for a company that offers a dyno chart before you buy.
I have a BMW f21 116i would a new downpipe be a wise option?
Tyler – They usually increase power and torque, especially when combined with a tuner and some other upgrades. But is it wise? If you have the money to spend, sure. If not, then no. 🙂
I’ve just bought a 2013 seat leon 1.6 tdi copa
Comes stock at 105 bhp I’m having a bluefin remap next week which will send it to 155 bhp with a massive torque return too.
Would a downpipe make much of a difference for me? Any info appreciated as I’m not by any means a petrol head…
What little things can I do to increase performance etc..
Any info greatly appreciated.
Jamie – Downpipes usually add 10-20hp, so while it will have an effect, it won’t be nearly as great as the remap. If you have the funds and want a little more power, it’s as good an add-on as an exhaust or air intake upgrade.
Beyond a tuner/remap, exhaust, and air intake, you can look into methane/water injection systems if you have a diesel. But I don’t know that I’d recommend that.
A new, upgraded turbo might be a better place to spend your money…
Will a downpipe make a big difference on a 2014 Astra opc?
Ryen – Maybe. What does the dyno sheet from the manufacturer of the downpipe you’re looking at say?
If i put a downpipe on a 2004 golf 5 tdi, will it go into limp mode ?
Chanie – It could. The trick is to make sure the downpipe is installed correctly, and/or that you have the proper tune.
However, the best company to ask about this is EuroSportTuning – they know all about performance options for VW. You might give them a call.
I get a Mitsubishi 3000GT VR4 1992 it has bi-turbo
What would be best for get a reacher sound and different.
Do you think it’s possible for it sounds like the La Ferrari ? I know I’m asking too much kkk my car is a V6 turbo. Or maybe I just should ask for it sounds better. Thank you.
Alex – Cool car! Hope you don’t have any trouble with it…those things are notorious for problems.
In terms of exhaust, I don’t know how to make it sound like a Ferrari. But a good tuned cat-back exhaust kit from someone like COBB is probably going to sound great.
Thank you Jason, it was a loooong rebuilding…. But now its wonderful “after all the trouble” over 1 year.
And after alI I had to learn some about mechanics and eletronics for this car too , in Brazil not so many great mechanics and electrians understand much about it. But I’m a very happy onwer.
Thank you for your advise, I will look for COBB over the internet and study about it.
Alex – That sounds like a really tough project – good for you. Most people wouldn’t try it, which means you deserve respect no matter the outcome. 🙂
Hey Jason, I got a 2013 Hyundai Genesis, looking to upgrade the exhaust work, something minimal so I can switch back just in case I have to take it back to the dealership for any warranty work, what would you recommend?
Chris – You don’t have to worry about warranty – modifying the exhaust system isn’t going to cause any problems, as long as you only update the exhaust behind the 2nd set of catalytic converters.
I’d recommend a tuned cat-back system designed specifically for your vehicle. Someone should have something for your car.
So they recommended me to do some headers, down pipe and cat back exhaust system work then get a street tune to get the car to push a little more without really digging deep in my pockets, what brands would you recommend for it? I’m not to knowledgeable with brand names or how well they perform
Chris – If you want to do a full exhaust system swap, you certainly can. However, in my experience, that money is better spent elsewhere.
If you’ve got the turbo, I bet there are some mods you can do that would get you a better return on investment (more horsepower for your dollar). If you’ve got the 3.8L, then maybe not…but I’d still check on that.
Headers usually don’t have much impact on modern cars. The factory exhaust manifolds are pretty good these days, and you really don’t want to replace them unless you make a big change to the rest of the engine IMHO.
I’m from Malaysia and in our market BMW Malaysia sells the 316i. A 1.6 litre TwinPowerTurbo powered F30 3-Series.
Im already running a custom muffler but is there any added benefit of a downpipe? and if installed, should there be any more needed mods in order to utilize the downpipe to its maximum potential?
Brennell – There’s always some benefit from an after-market downpipe. The trade-off is usually increased emissions and/or increased exhaust gas temps. But, if you’re not too concerned about emissions, and not worried about the turbo for some reason, then go for it.
I have a 1994 Nissan Silvia S13 non turbo, would there be any benefit to replacing the stock down pipe with an aftermarket one?
If you’ve got a non-turbo engine, you have no need for a new downpipe…
Hi there.
I managed to get a 2007/8 Mercedes-Benz C220 CDI.
A friend of mine suggested I do a down pipe, mostly to reduce my turbo lag, but also for better performance and fuel economy, as the stock system is very restrictive. Cool, all well and good. How true is this too??
My concern is, it`s my daily car and i can`t afford for anything to go wrong. Would it be viable on this sort of vehicle???
Many Thanks
Vaz
Vaz – If there’s a downside to a downpipe, it’s that some aftermarket units raise exhaust gas temps. This could cause premature turbo wear.
Having said that, I’m not at all aware fo this happening with any frequency. Also, a lot of the people who have had turbos burn up are using after-market engine tuners in very aggressive modes. A tuner can burn up a turbo all by itself if it’s tuned too aggressively.
My opinion is that buying a downpipe is a good idea if you’re trying to maximize performance on a budget. If you’re just looking for a little tweak to make your daily driver more enjoyable, you might skip the downpipe and just go wih an upgraded cat-back system. You’ll get some more oomph (and engine noise), but you won’t have to worry about wear and tear.
i have volvo s40 with turbo, how much horse power that i get if i downpipe the exhaust ?
Raz – More, probably. Read the article! 🙂
Do recent model WRX’s need to have their ECU reflashed if adding a J-pipe and resonated cat?
Rich – Probably not. But, it will run better if it’s tuned after you add those parts.
Hi there,
I have a 2018 audi rs3 sedan i was wondering if downpipe is a good idea
Adam – Probably hard to buy a downpipe at this point for that car. Also, probably hard to improve on whats’ in there at this point.
I don’t know that I’d do much to an RS.
2014 Cadillac ATS I4 2.0T. What cold air, down pipe, exhaust combination would you all suggest for best performance increases?
Cad77 – Probably something from rpm-motorsports.com. The guy that runs that company has been modifying GM engines and building kits for them for about 10 years now. They have a lot of good history.
I have an Audi a4 2017 (b9) I was wondering if adding a downpipe to the car would make the car sound significantly better, also where is a good place to find them? If not a downpipe what would be the best recommended part to change in order to get a nicer sounding car?
Allen – a downpipe probably won’t change the way your car sounds (at least not much), but it will definitely give you more power and better throttle response. I’d point you to EuroSport Tuning for products – they’ve got a good selection.
So I’m looking for a new down pipe and cat. For my 2012 Jetta it’s a 2.0l 4cyl and I can’t seem to find anything aftermarket. What should I do and or where could I look. I kinda blew the flex pipe so that’s the reason for changing but I also intended to upgrade.
EuroSportTuning.com
I got golf mk6 tdi 1600, 105 hp tuned stage 1. Now i have 141 hp on wheels.
I bought a downpipe 3”. Good idea?? Would it increase performence?
Yep – a downpipe is a good investment for any turbo car.
Hey i own a toyota corolla 2005. Just installed an exhaust and now thinking of buying a downpipe too ? What would you reccomend ? Its not turbo charged. Thanks.
Shawaiz – If you don’t have a turbo, you don’t need a downpipe. 🙂
good day Jason.. i own a 2012 MK6 GOLF GTi DSG what can i do to improve the “brrrr” sound upon shifting a gear and make it sound as loud as the Merc A45. Also what can i do for perfomance gains but not too much power that it winds up torque-steery.
mcneil – I’d go with a downpipe kit from someone that specializes in VW – Neuspeed, for exmaple. I’d also hit up Frank at EuroSport Tuning and see what he says. 🙂
2017 cla45 amg, bought a 200cel catted downpipe and an ECU tune..what do you think will be the expected gain..Thanks
Anthony – What does the manufacturer claim? Usually that number divided by 2…
I have a 2015 Kia Optima SXL Turbo Charged with a muffler delete right now. Will it be worth to get a downpipe?
Josh – If you want an extra 10-15hp, a downpipe will help get it. But they can be expensive, even if they’re catless (and they won’t usually pass emissions without that catalytic converter).
I have an audi 1.4 tsfi 2017,tuned with sedox performance went from 150 to 174 hp , will do any good the downpipe despite the small engine??
Thank u
Jose – Absolutely. EuroSportTuning.com. 🙂
I have a 2013 Genesis Coupe 2.0T, recently added intake and dual borla exhaust with deleted resonator. Is a down pipe necessary/ a good idea?
Daniel – Anytime you have a turbo, a downpipe is a relatively cheap and easy way to boost performance. The downside (other than expense) is that it can increase turbo temps. It can also keep your vehicle from passing emissions if you opt for a cat-less downpipe.
However, downpipes are consistently capable of adding 10-20 hp and ft-lbs of torque. They’re a great performace add-on for all turbocharged vehicles.
Thanks Jason, does my ECU need to be flashed or retuned with the down pipe?
Daniel – A tuner is a very good idea. While a downpipe will add power without any tuning, you’ll get more out of it if you can get a custom tune that accounts for your downpipe.
2018 kia stinger gt. Looking to purchase the Jun BL catback evc exhaust and downpipes. Any suggestions
Don’t drive too fast? 🙂
Sounds like a good idea to me.
hi I have a non turbo 2016 honda accord lx (2.4L i4)
will a Downpipe and a tuner significantly increase power?is it worth it assuming the cost of both is 1000usd.
thanks
kurtis – No turbo? No need for a downpipe.
I have a 2017 honda civic hatchback Lx (base model) with a 1.5 L turbo engine, is it worth getting a down pipe?
Mahmoud – See previous comments asking pretty much the same exact question.
I have an Infiniti G35 I am thinking of adding a down pipe and eventually headers and y pipe . How much horse powers you think I may gain? And what are the benefits?
Chrystal – 10-15hp is about all you get when you add an exhaust. It’s not bad, but it’s good to combine an exhaust with a tuner and an air intake to maximize output.
As for the downpipe, I don’t think your G35 came with a turbocharger. So, adding a downpipe won’t do you any good. 🙂
Hi, I have 2007 Subaru wrx and I want to make my car have more of a rumble . Should I go catless Downpipe ?
Jose – I wouldn’t. No 4-cylinder is going to have a rumble (at least not a rumble like a V8), and a catless downpipe is going to make it harder for your car to pass emissions. You’re better off going with a hi-flow cat downpipe, at least if we’re talking about a street car.
I’ve got an 06 cobalt ss/sc, would I benefit from a downpipe?
TJ – You need to go to one place my friend – ZZP makes cheap kits that add an obscene amount of power for just a few dollars. Safe and reliable upgrade too – https://zzperformance.com/collections/ecotec/products/2-2-2-4l-turbo-kit
Hey i have a 2015 chevy sonic and want to knownif i should put a downpipe on it. I have a 2.5inch pipe back from the cat to a rez. Will i gain anything from this? (ie. Louder, hp)
Nicholas – If you’ve got the turbo engine, than yes a downpipe will help you. They usually add a pretty good amount of horsepower (10-20) and they make the turbo more responsive too.
Normally, the 2.5″ pipe you’ve got on this car would be crazy, as it’s way too big for a 4-banger. However, because you’ve got a turbo, it doesn’t matter too much.
Hi I have a 10gen civic 1.5T with a HKS catback exhaust, would a prl downpipe fits on my car? Thank you
I Have An 2018 EcoBoost Mustang , Can You Give Me The Best Like Tell Me What I Can Do To make It The fastest EcoBoost Out zithers …
Like Tell Me What parts in what stages I need to buy
I was planning air aid mxp series cold air intake , Rc exhaust as stage 1 and then Cobb accessport as stage 2 and mishimoto intercooler and downpipe as stage 3
Please suggest correct mods if I’m wrong
Hi. I have a GLA 180. 2019. Is it wise to change my downpipe?
Faliq – Wise? I’m not sure. If it’s a leased vehicle, probably not. If you can’t afford to pay for a check engine light, probably not.
But if you’ve got the cash to deal with a repair (just in case – adding a downpipe shouldn’t cause any problems), and it’s not a lease, why not? It will be fun, right?
I have a 2011 subaru sti. Does my year need a down pipe when I change my exhaust?
Need? No. But it will increase horsepower if you add one.
Hello everyone. I own VW Golf GTI MK6. I am about to do a straight pipe using stainless steel 65mm pipes. Would straight pipe provide “unrestricter airflow” that downpipes do? Or if u know how good will the result be after straight piping a GTI? I know the sound will be awesome but what about performance?
I drive a 2014 maxima with air intake and full exhaust system. Would I have to install a turbo in order to have a down pipe. I’m also new to the car mod enthusiasts.
Yes. Can’t have a downpipe without a turbo.
I have 2019 Dodge Challenger SXT and I want more horsepower with sound I currently have and may be getting soon. Is adding downpipe to the vehicle worth it and if so, which one and how much hp would I get from it?
Alejandro – You can’t put a downpipe on a 2019 Challenger SXT, at least if it has the 3.6L. No turbo.
do u need a turbo to install an aftermarket downpipe
Yes
Which downpipes; intercooler; intakes would you recommend to tune bmw F10 535i?
Cyrus – I’d contact Frank at EuroSport Tuning and do whatever he suggests. 🙂
I have a civic rs turbo 2018 model what woul benefit my car if I installed it with PRL downpipe and front pipe
Thanks
Nick – Could make it a little faster, but probably not a ton. Have you done a tune yet? Hondata can add a lot of power to turbo Hondas…
I have a 2015 A45 AMG
Have already installed Piggyback ECU (RaceChip BLack GTS) and throttle response.
Grateful for your thoughts on downpipe (gains?)… Given it is a Turbo AMG, what level of improvement (in general) would you expect as compared to the stock AMG system ?
Thanks
David – I wouldn’t mess with an AMG, but if I did it would be something from Akrapovic or maybe Milltek. AMG does a bang up job of squeezing all the power out of an engine, so unless you spend a lot, you’re probably not going to see much in the way of gains (well, unless you remove the cat, which I never recommend).
Hi there , I have a type r 2017, thinking of getting a down pipe? Looking for some loud pops, any suggestions?
I have a 16 Infiniti Q50 red sport 400.. im looking at a cat back exhaust an lower downpipes. Ecutek tune, and heat exchanger. .but the lower downpipes i have mixed signals. .just don’t wanna give up reliability an dependability.
Damn, it’s cool seeing the author still responding to the comments years later.
Even the most mundane/ordinary/bland of vehicles can benefit from aftermarket exhausts if done right – my 3rd gen V6 camry’s factory downpipe has an awful bend from the rear cylinder bank to the collector – it’s more like a T-junction rather than a Y-junction. Getting a nice, smooth bend and upgrading from factory 1.75 inch to 2 inch pipes provides a much less restricted flow. For NA applications you’ll notice a slight increase in pull in the mid-range rpm, but if you ever decide to turbo your camry the better flow will be essential.
I have a 2020 GMC Terrain Denali 2.0 turbo….what would downpipes do for me ?