Will I Gain More Horsepower With An Exhaust System?
After-market exhaust systems are almost always less restrictive than factory exhaust systems. However, that doesn’t mean that adding an after-market exhaust will always result in more power. Depending upon your vehicle and the system you choose, an after-market exhaust can add as much as 50 horsepower or as little as 2 or 3 horsepower. Here’s how you can figure out what to expect:
Don’t Focus On Horsepower Only
Horsepower is calculated by multiplying torque by RPM. Therefore, if a new exhaust system adds just 10 lb-ft of torque at 5,000 RPM, that will result in a horsepower increase of 9.5 hp. While that might sound like a solid horsepower gain, an extra 10 lb-ft of torque at 5,000 RPM usually doesn’t do you a whole lot of good in day-to-day driving. After all, how many of us run our engines at 5,000 RPM on a constant basis?
Throw Exhaust System Manufacturer Estimates Out the Window
Because horsepower is a function of RPM, it’s very easy to show big horsepower gains on paper. Diesel trucks are a great example – because they generate gobs of torque anyways, adding an extra 35 lb-ft of torque at 3,300 RPM results in a gain of 23hp. This number may seem impressive, but an extra 35 lb-ft of torque at 3,300 RPM isn’t that useful to your typical diesel truck owner. It’s a good increase to be sure, but it’s not usable power.
The other reason that you shouldn’t put a lot of stock in manufacturer estimates is that dyno results are fairly easy to manipulate. When a vehicle is tested on a dyno, there can be significant variations from test to test without any change to the engine. If a manufacturer takes their worst run from their “before” tests and their best from “after” tests, they can show a really big gain that’s mostly due to normal variations between runs.
In other words, exhaust system performance estimates are always very generous. If the kit from Flowmaster supposedly adds 8 hp and the kit from Magnaflow supposedly adds 13 hp (or vice versa), chances are good that both perform pretty close to the same.
The Most You Can Gain is 2-5%
If you want to know how much power you can expect to gain from adding an exhaust system to your car, assume that your engine will get 2-5% more powerful. More specifically, large engines like a big 6.0L V8 typically see about a 2%-3% horsepower increase. Smaller engines, like a 1.8L 4-cylinder, typically see a 3-5% horsepower increase.
HOWEVER, exhaust systems have a multiplying effect if you combine them with other add-ons. The exhaust system by itself won’t add a lot of power, but combined with an air intake and a performance chip or power programmer you could see a significant increase in performance. You’ll also see a slight increase in fuel economy (assuming you keep your foot out of it, of course).
Remember That The Intangibles Have A Value
Adding an after-market exhaust system to your vehicle isn’t just about adding some more horsepower or improving fuel economy. You’ll enjoy a sportier exhaust note, better throttle response, and hopefully driving will be just a little more fun.
Considering how inexpensive an after-market muffler is, it’s a nice way to customize your vehicle on a budget. The icing on the cake is slightly more power and improved fuel economy.
honest grass roots, readable and not over the top techo tripe, well done
Thanks!
How much are those programmers?
if im runnin an after market muffler which is a flowmaster should i install a high performance intake also?
justin – There’s definitely an advantage in upgrading both your exhaust and your intake, and I would recommend both. Even if you just add a performance air filter.
Hi
Thanks for your article 🙂
Any idea about the gain with the combo you suggest?
You said 2-5% only the exhaust so I guess around 10 with the combo?
Thank you
Depends on the engine. As a general rule, the combination of a programmer, exhaust, and air intake can add at least 20hp. The compromise is that your vehicle will be louder and that most after-market tunes require you to run premium fuel.
Hello,
I have a 1977 Chrysler Cordoba with the LA 360 4bbl making a factory 170 HP. I will be putting a pair of chrome shorty headers along with an X-,Pipe 3″ dual exhaust system with a pair of high flow performance mufflers. I will also be replacing the factory cats with after market high flow cats.
Can you give an idea of an approximate increase in HP and TOURQE?
I will also be installing a new set of iridium plugs and synthetic motor oil. Also I will be putting in an electronic HGH performance ignition system with the factory air cleaner with a K&N air filter.
With these changes I given, what kin of HP gain can I expect? The only other upgrade I plan on a bit later, will be a high performance intake manifold with a rebuilt factory Carter thermoquad carburetor. And what type of HP gain from the new t intake give me?
Thanks,
Bob Albertson
Bob – No idea. A 360 can easily make 300hp, and with massaging could jump up to 400hp…but this is an old car with what is (I’m assuming) an original motor. You could very easily stress the motor.
My advice is to get with the local classic performance shop, ask for some quotes on things, and see what you can learn. You also may find that there’s a rebuild kit for your 360 that boosts power, with new cams, upgraded internals, etc. Good luck.
I have a Dodge Charger 100th year anniversary edition. It has 370 Hp. BY how much will the Hp increase if I add a varex exhaust system ?? I read earlier that if I install Magnaflow exhaust system, I could gain a min of 20hp. Is that true?? Your explanation will be highly appreciated.
I own a 2011Genesis Coupé 3.8, I’ve put a forced Cold Air Intake, a PCR Performance Chip, Headers, 3″Dual Straight Pipes, 3″Test Pipes & Borla Exhaust Mufflers.. to a 306hp engine. What’s my total hp gain or increase?
About the cool air intake and new exhaust does it also help with horse power if you keep the motor cool any way possible extra fan I have a 01 f 150 5.4 when the weather outside is cool my truck seems to run stronger and smoother we
Ok so hi guys I just bought a 2015 Corolla s 1.8L. Now Its a good reliable car. I’m just trying to gain more hp. And I wanna do that without stressing the engine. I’m just think about getting a exhaust system, intake, and a computer chip. Any suggestions.?? To how how much hp I can gain with that?? Will it affect my engine too much?? It only comes with 132hp. Which is not enough lol. Plz suggest and advise on what should I do.
Moe – I wouldn’t try anything radical with the newest Corolla, at least not until the after-market releases some parts specifically designed for this vehicle. I’d say you need to wait 12-18 months to see what comes out (if anything).
I put a flowmaster muffler to my 2015 corolla and it feels more powerful at running but I do not feel a big diference on takeoff which is what I Don’t like about this car I am going to buy a K&N Typhoon intake specifically made for this type (model) of car I will post what I get
hey, I’m thinking about doing the same thing with my 2012 Corolla. Did you get the K&N cold air intake? How’s the performance?
Edgar – Unless you buy a turbocharger or something, you’re not going to notice a big difference regardless. It’s still a 4-cylinder economy car.
i got 04 hyundai tiburon GT model. recently i installed cold air intake & it sounds gr8 & take off quick. i’m planning to add G-Force chip & cat- back exhaust system. any idea how much HP it gonna make after installing chip & exhaust in combo? thanks
Girish – I would suggest that you do not buy G-Force chips. They do not add any power – all they do is mess with the fuel maps. I’ve tried numerous times to get them to provide dyno testing to prove their claims and my requests have gone unanswered.
But a cat-back + intake will add 10-20hp, all things being equal. Not a ton, but definitely not bad. Just find a quality tuner and you can pick up another 10-20hp.
I have a 2002 yukon. I’m putting on headers, cross over pipe new cats and a full cat back system including the muffler. All of it is from Flowmaster. How much of an increase will I see? Will not be doing an intake, next step is a supercharger which is why I got the full exhaust. But the supercharger will require getting a new trans. Stock one can’t handle all the extra power.
I have a mustang 2008 v6 . I am adding a shorty pypes headers,AEM cold air intake,True Dual Header Back Exhaust System – Pypes,Ignition Coil Pack Screamin’ Demon and Superchips 1841 F4 Flashpaq. What horsepower increase should I expect.
Jason you seem knowledgeable I rarely write on these blogs but I have a 2015 f150 5.0 v8 385 hp a little under 400 torque stock. I added a high performance roush cold air intake which I have to say is amazing I’m trying to tell people it out does the k and n but anyway I also put a black dual mbrp cat back exhaust system on which not only looks nice but has added power and sound but not that obnoxious fake noise…I’m a little afraid of tuners and programmers especially how sophisticated these new engines are I didn’t get one and don’t intend cause they buck your warranty and lower the life of your engine but some people swear by them so instead I got a brand new 85mm bbk throttle body I didn’t get the 90mm and that made a huge difference. If I were to guess I’m getting anywhere from 30-50 extra horses that’s my guess acceleration is unreal and my mid-range power is where I recognize the most gains. Any thoughts please feel free to criticize as well haha…I was told my trucks computer will adapt to all of this so I don’t have to make any tunes. Help me out if you can thanks bud
so If I calculate this on my car I will gain 172 hp at max output? or am I doing something wrong (obviously) because at 6600 rpm (max output) x 137 = 904200/5252 = 172 hp ????
somebody please explain I am confused.
TJ – If you’re referencing the horsepower equation at the top of the page, that’s not a tool you use to predict HP – it’s a formula you use to calculate it based on a torque rating. It’s in the article to show that horsepower is really a proxy for torque at a specific RPM.
If you read further down, you’ll see that your typical gains in power range from 2% to 5%, with most vehicles coming in closer to 2% than 5%. If you have a 150hp car, your probable exhaust system horsepower gain will be 3-8hp.
Oh, haha, thanks for the info it’s clear now, it was actually a stupid question coming from me!
I have a 2014 mustang with a 6 I put a roush cold air intake and a cat back muffler by roush it said I didn’t have to change anything in the computer is that right and would I get more horse power. It seems like it did but it could be me
Hello i wanna ask i have mustang GT 5.0 2015
i added intake K&N + Flowmaster exhaust +program
can you tell how much horsepower do i gain ?
thank you
Alaa – Depends on the specifics. 20hp on the low end. Could be a lot more, depending on the programer and how you measure.
I have a 2003 Mustang GT. The current mods on it are BBK Cold air intake, Borla Catback Exhaust, and lowering springs. I was wondering about how much power do you think the cold air intake and Borla cutback exhaust added. I also have a tuner it a BAMA ITSX wireless tuner I haven’t added the tune to the vehicle yet, but do you think that’s a quality tuner in your opinion and how much would that tuner add do you think? I’m also having 3.73 gears installed sometime this week with a JBA Off Road H pipe. I’m thinking that the BBK Cold air intake and the Borla cutback will add about 15-20 combined. I think the tuner may add another 15-20. The off road H I think would add about 5. The gears would not add any, but would improve acceleration and allow to get into power band quicker. Jason, you seem pretty knowledge and any thoughts from you would be appreciated.
Hi Bob,
I have a Honda Jazz engine L15A1 engine, I have already done a level 1 upgrade, I have installed 4-2-1 exhaust header & want to change stock exhaust system post catalytic converter till the muffler, how much power gains should I expect, the 4-2-1 header highlights 3-4 bhp dyno gains from the manufacturer, how much gains should I expect with changes about above.
Yes hi i have an audi a4 1.8t 2001 and im planing off buying an exaust system? But injust read ur combo …so if i just put a muffler and a intake plus a chip…how much hp do i gain.,?. Thanks…
Berto – Check the dyno charts on whatever you’re looking at.
I have an 2006 Dakota SLT V8 4.7L Quad cab 4×4 . I added the Super Chip programer to the truck, now I can eat any F150’s for lunch at any speed, especially starting at 100km side by side . Next is some custom dual exhaust from the muffler shop.
I drive an 2002 GM duramax, lb7. I have an S&B intake, EFI live (spade) tuner, and an exhaust system with a 5″ tip. I guess I’m a little bit confused on the how calculations work?
Heather – The calculation in the article is regarding horspower…if you know how much torque your exhaust system adds, you can calculate horsepower.
But if you’re wondering how much power the exhaust system you already installed has added, I don’t know. Dyno it. 🙂
Hey what’s good. I’m whipping a 07 TL Type S 3.5 do you know of any websites where I can find performance headers for my car? Also what performance chip would give me the best HP? Please help me out. Thanks.
Drew – You can probably buy headers that fit the 3.5L V6 Accord and put them on your TL. I’d check with OBX, DC Sports, Megan Racing, etc.
CT Engineering too.
I have 92 camaro L03 170 hp 255 tq. it has a chip, headers with straight one 2 and half inch pipe with flow master with high flow intake. How much hp to I gain? With accel distributor and coil.
Robert – Dyno it.
I have a 2015 Chevy SS which I put a Rotofab CAI. what exhaust system would recommend for best sound and HP gains. Also would you do headers and exhaust or cat back type exhaust? Thanks for advice.
Daniel – I have no brand recommendation, only I’d look at Corsa for sure. They produce some pretty good Vette exhausts IMHO.
As for what I would install, I’d stick with a cat-back to start. The SS uses the Corvette’s motor and exhaust manifold, which is carefully tuned. Unless you’re making some other changes – like adding a supercharger, cam changes, or some other intensive update – I’d leave the stock manifold alone. It’s as good as anything you’ll find on the aftermarket (probably better).
@Jason, Thanks for advice, I have a Corsa coming soon and will hold off on a tune until I put in the supercharger(a bit later).
Looking to add significant horsepower and torque to me 5.7 2015 dodge challenger. Where should I start and what brands are recommended?
Matt – No recommendations other than buying parts that come with dyno charts as proof of the promised gains. 🙂
Hi
I have a stock 2014 GMC Sierra crew cab with a 5.3L V8.
I just had installed a Borla Cat Back exhaust with air intake.
Sounds awesome and feels like it has more power.
Does anyone know what kind of HP/Torque gain I can expect if any?
Thanks
Paul from Cali
Paul – Anywhere from 10-20hp, and about the same amount of torque.
If you get an engine tuner, you can double or triple that, especially now that you have a freer flowing intake and exhaust.
Hey I Have A 2004 Mitisibushi Eclipse 2.4l & I Was Wanting To Upgrade My Exhaust System & Get A Cold Air Intake. How Much Horsepower Would It Gain. I Don’t Know Much About The Programmers But Would Like To Know The Price Of One.
Murad – Programmers run from $300 to $1200, depending on the type of vehicle and the brand of programmer. They add a good amount of power, however, so they’re usually a good investment. Most programmers will find a way to increase your engine power output 10%, more on vehicles that are turbocharged.
As for adding an exhaust and cold air intake, you’ll find the combo increases engine power about 3%. On a 200hp car, for example, that’s 5hp+. On a 300hp car, that’s 10hp+.
I have a 2008 dodge caliber with a 1.8 litre engine , 5 sp manualI just added a new flowmaster muffler and a bigger air intake filter…will this increase my hp any.
Thanks
David – Probably, assuming the muffler and air intake were designed for your specific vehicle.
Great article. I’m thinking about getting a Perrin Non-Resonated catback exhaust for my 2017 WRX CVT. I am wondering if I should also get an air intake as soon as I can as well and/or anything else that won’t void my warranty, so chip tuning is out of the question for the time being. Thanks!
Jonathan – Sorry I missed your comment.
First, whomever told you that a tuner or programmer will void your WRX warranty is full of baloney! 🙂 There’s something called the Magnuson Moss act that makes it illegal for any manufacturer to invalidate a warranty just because an accessory was installed. Unless you add a tuner/programmer that causes a major problem somehow (and that is nearly impossible, especially if you go with a brand name tuner), you’ve got nothing to worry about. If you’re paranoid, you can unplug the tuner before you take the car to service (and/or revert to the stock tune), but I wouldn’t worry about it.
Second, the three things you want to look at on a WRX beside the tuner are intake, downpipe, and cat-back exhaust. There are some systems that combine downpipe and exhaust that are worth a look too. It’s not hard to had 50-75hp to a WRX with the right parts.
In terms of brand names, I don’t have any strong feelings. Just look for something that has dyno chart data. Manufacturers that don’t publish dyno charts usually aren’t selling good parts.
I just put a K&n cold air and super 44 exhaust on my 01 jeep grand cherokee i6 4.0l…any idea what I’m increasing there? HP and Torque wise? Would love your input, thank you!
Cameron – 10hp?
Hi Jason,
I have a 2010 Jaguar xfr with 5.0 L V8 superchared engine with 510hp stock , so what is the safest way to get it to reach tle 600hp range ? And what kind and brands of parts do you recommend?
Thanks
Sabana – You can probably hit 600hp with a custom tune, but I’m not certain. Usually, the automakers leave a fair amount of power on the table when they do forced induction. You can also put on a small nitrous kit – a 100hp boost isn’t really that much, and it’s very safe if you only use it at the track.
Still, you said “safe”, and the safest thing to do is to leave the engine alone. Good luck. 🙂
Dear Jason,
Thank you for your reply , just saw it 🙁 sorry !
Honestly , i was thinking of putting an air filter and a tunning chip from RaceChip Ultimate which they said it can give more than 70bhp and more than 80Nm torque with 2 years waranty on the engine .
What do you think ? Is that safe enough? Can it harm my engine or gearbox in any way?
Thanks again for your time , apriciate it 😉
Sabana – It’s extremely unlikely any chip will harm your engine or transmission.
Hi there I have a few questions I have a 2016 hyundai sonata sport 2.0t, does it really help out my acceleration and performance if I do the whole exhaust package? And have you ever heard of the performance chip how affected is it tors you’re vehicle? Thanks for taking the time of reading.
Juan – A chip or tuner is a good option for most newer cars. Lately, auto manufacturers have been leaving a lot of performance on the table out of emissions and fuel economy concerns. I’d guess a tuner will had 20-30hp to your Hyundai, and maybe more.
As for an exhaust system, yes, they do offer some power. But it’s not a lot – 5-10hp is pretty normal. Still, when you combine that with an intake and a tuner, you can add 30-50hp pretty easily. That makes a real difference.
Hi Jason from your past experiences how much should a tune up roughly cost and is it worth it or should I jus leave my car stock and just save up for my next purchase which will be the genesis model sport mode of course V6 twin turbo I hope lol thank you so much
Juan – Tuners run $300-$1000, depends on the car. I don’t know what’s available for your vehicle – I’d suggest going to autoanything.com or maybe summit racing to find a tuner. Then, you just plug it in, select the program, and you’re good to go.
Not sure which exhaust system to use I have 2016 diesel and I want to put dual exhaust on but don’t want to loose my warranty any suggestions and would It make any difference? Thx gary
Gary – Adding an exhaust system to your truck won’t impact your warranty, provided you don’t remove the DPF or doing something screwy with the downpipe.
The standard advice is to look at a few systems offered specifically for your truck, find a manufacturer that offers good performance for a fair price, and go for it. I don’t have any specific recommendations, but I’ve been a big fan of Banks systems for a long time…
Hi, I have a 2014 GMC Sierra 1500. I recently put a K&N CAI and an edge evolution chip on my truck. I’m looking at doing an exhaust. What kind of power gains should I expect with a exhaust and is it worth it? I have been a fan of Corsa but is there a make that you would recommend? Thanks in advance!
Johnny – Corsa is great, and I’d expect to gain about 10hp and 10 lb-ft of torque. My only advice is to ask a few people about drone…pickup trucks have giant resonators on the back of them (the pickup bed itself), and some exhaust systems make a heck of a lot of noise at highway speeds. You want to avoid that if possible.
Gibson is another good brand.
Hello.. anyone have an idea of the increase Hp/torque on a 2016 Dodge Dart Gt sport after adding the mopar cat back exhaust system and cold air/air inductor.?
Daniel – I’d be shocked if the combination of an exhaust and intake added more than 10hp on a 2016 Dart. That car just doesn’t make that much power, so it’s not possible to add much power.
Still, the combination of an exhaust and intake will sound great, and if you add an aftermarket performance tuner to the vehicle, you’ll enjoy an even bigger gain. Most tuners have a program for vehicles with an upgraded intake and exhaust that’s more aggressive with the fuel map.
Hi there I have a vw passat 2003 v6 2.8L engine and I would love to put a cat back exhaust and air intake…. can anyone tell me how many hp i can gain with this upgrade ?
thanks
Tim
Tim – Check the dyno chart on whatever kit/kits you’re looking at. The answer is there.
I have a 2017 mustang gt with ford installed phase one Roush supercharger. Looking to install magnaflow street catback exhaust system. Assuming the 670 hp and 545 ftps is accurate what could I reasonably expect. Mostly doing for exhaust note, but would like to know. Thanx
Rick – If you’re running forced induction, you can throw all the tables away. Just go with the biggest set you can afford. Your engine will not be impacted too much by size.
Hi guys,
I have a 2010 mercedes c250. 2.5L V6. Install dual cold air intakes, resonator deleted and aftermarket flow through mufflers. Do you have a good recommendation for a tuner or chip to complement my set up? Or any other suggestions on where to go from here? Also if you ha e a guess on gains I incurred that be a bonus. Thanks allot guys!
Luc – First, if you haven’t reached out to Frank at EuroSportTuning, I’d do that next. Guy knows his stuff.
Second, most tuners will offer a custom tune based on your current configuration.
I recommend talking to Frank because he sells all kinds of tuners and also runs a tuning shop. He can tell you what’s good.
Hi I really enjoyed reading your article but I think you forgot to mention back pressure or maybe you did with a different term, but I was thinking of getting two resonators on the tips of my car exhaust for better take off what do you think?
I have a 2015 Dodge Dart SXT 2.4 l and I already have a full exhaust catback with a high-flow resonator a cold air intake performance chip a lightweight pulley and a throttle body spacer can you tell me how much horsepower I have gained the stock horsepower is 184
Israel – Backrpessure isn’t really a thing. It’s sort of slang for “changing the exhaust tubing size impacts performance in counter-intuitive ways.” You don’t actually want ‘pressure’ going backwards into the engine. You just want to size things correctly so that the exhaust pulses facilitate cylinder scavenging.
As for horsepower, I’d guess the exhaust and intake are good for 10-15 hp total, the pulley is good for 5 hp, the throttle body spacer has no effect, and the programmer is good for 20hp. So, I’d put you at 215hp or so.
I don’t understand how you got those numbers? Because if you’re right my math is way off. But I think I’m probably closer to the right horsepower because my cousin has a 2011 Nissan Maxima and I can keep up with it and his cars at 290 horsepower 🤔
This is the math I did for my parts
-intake has 10hp hps brand with Dino proven pictures
– the lightweight crankshaft pulley is 10 hp groovin by the website with a lot of torque
– performance chip is supposably 40 horsepower but I think I’m only pulling 30 until I get it dynoed.
– exhaust system I’m going to guess 10 to 20at the wheel
= 268 or around there.
I have a 2017 Renegade Deserthawk with the 2.4L Tigershark engine. The cost and temp of turbocharging seems off the table, but it would help for a bit more hp n torque. It’s a capable vehicle in its class just needs a push. Any suggestions
Richard – Tuner. 🙂
Hey I have 2011 Toyota Camry 4cy I just have air intake wanted to
Know if I just do the exhaust how much horsepower can I expect alias what other things can be done I know there is no such thing as chip for Camry for some reason
David – There aren’t many companies selling tuners/chips for Toyota vehicles, but there’s a company called UniChip that makes tuners for Toyota brand vehicles. You should contact them and see if they have a kit that will work for your Camry.
But to your question, an air intake adds 5-10 hp, and a cat-back exhaust will be about the same. So, not a whole lot…but it will sound great, and if you go for one of the unichip tuners you’ll notice a nice increase with the full set.
What kind of tuner chip/programmer should I get for my v6 3.6 2018 Dodge Charger I already got a k&n cold air intake and magnaflow exhaust and how muc horspower do you think I have with just the intake and the exhaust system?
Diego – With the 3.6, you’re not going to get a whole lot with an air intake and exhaust. 20hp max. A tuner will get you some more, but you might think about a supercharger. That 3.6L is the same engine that’s in the Wrangler, and there are a few companies offering kits for it.
I have a 2011 GMC Sierra with a 5.3L with a K&N cold air intake and a Hypertech Max Energy programmer running the premium tune. Upgraded my exhaust to 3” from the converter back with a 40 Series Flowmaster muffler. What can I expect my horsepower to be with these upgrades?
Hello. I own a qashqai 1.6 petrol from 2008. I have a k&n air filter,air turbine, magnaflow 400 catalytic with a twister complete exhaust. The performance increased considerably but i want to know if is worth remapping. Will this remap will help the engine to run better with the new accesories? Thank you
I have a 2008 Nissan Sentra SER Spec v 2.5l. Just got a injen cold air intake, Megan header and down pipe, and a custom 2.5inch cat back. What gains would I see crime that? I’m thinking 10-20hp maybe. 🤷🏻♂️
From not crime. 😂😂😂
Robert – That exhaust sounds too big – you might find that you’re slower off the line. Also, unless you’ve added on a turbo, adding a downpipe won’t be possible.
But a tuner, a simple axle-back exhaust, and a cold air kit will add a few horsepower and sound better. Just don’t go too crazy – that CVT Nissan put in those isn’t exactly rugged.
I have a 2007 Grand Prix GPX with 139,000 miles driven on the car. I just had the transmission rebuilt at 133000 miles. If I do modifications on the exhaust and the cold air intake will that add more horse power to my car? If so how much extra horse power would it be?
Randy – Exhaust and intake are usually good for another 10-20 horsepower, with smaller engines seeing the lower number, and larger engines seeing the higher number. But with a 140,000 mile engine, I don’t know that you’d see as much.
I have an ’87 Toyota 4 cylinder truck with a little motorhome built onto it. The vehicle is obviously under powered- especially on hills. The engine has 110,000 miles on it and has an extra large cooler for the tranny. some folks who own these replace the entire exhaust system claiming an increase in power. The exhaust is in meed of replacement so I am thinking of going with a system that could increase the power but don’t want to stress the engine. What do you think? Thank You!
Kathleen
Kathleen – I’m a little familiar with the old Toyota motorhomes – very cool piece of 80’s culture! Anyways, my guess is that you have the 22RE 4-cylinder, and if you do, you really don’t need to worry about the engine. Just make sure you listen for a loose timing chain.
As far as upgrading your exhaust for more power, it might have a small benefit. There’s a company called LCE Performance that has a cat-back kit for your truck that might be worth a look.
I recently bought a Jetta GLI 35th anniversary and will like to make some upgrades. Any recommendations to improve sound and maybe gain a few horsepower or torque?
Cat back exhaust. 🙂
Hey, I have a 2008 Infiniti G35x 3.4L V6. I just got it and was curios as to what mods I should put on it first for better performance. I was thinking of getting a cold air intake, a performance chip and a exhaust. As well as suspension for handling. Are there ones that you would prioritize over the other and how much horsepower and torque do you think these mods would add? Also is there a specific exhaust that you would recommend, I was thinking a AKR catback dual split exhaust.Thanks!
Reed – A chip/engine tune, exhaust, and intake is a good start for engine power. I’d definitely prioritize a chip or tune over the rest. As far as suspension, a good set of shocks along with an anti-roll bar can make a huge difference at a low cost. If you go for a coilover set, even better.
I don’t recommend any specific exhaust, just make sure you buy something that has a dyno chart for your specific make and model.
I own a 2011Genesis Coupé 3.8, I’ve put a forced Cold Air Intake, a PCR Performance Chip, Headers, 3″ Dual Straight Pipes, 3″Test Pipes & Borla Exhaust Mufflers.. to a 306hp engine. What’s my total hp gain or increase?
Hey Reed,
You can tune your car without the upgrades such as exhaust and cold air intake. But you will have to retune once you do install these because updates to your tune when these are installed will need to be installed. Better to install the upgrades first then tune your car..
May I suggest bully dog tuners… check the website to see if your make and model is listed
I got a 2014 SRT Jeep… I bought a JLT cold air intake, a JLT oil can and thinking about a cat back exhaust.. but don’t know which exhaust I should add and how much power it will add.. I. Heard Magnaflow offers the highest HP gains.
hi will a fd74 cobra back box increase bhp insurance company has asked me havnt got a clue thanks all
Hello, thanks for the info guys. So I have a 1998 Honda Accord and just did the whole exhaust system, from headers to muffler. My headers are from Megan racing and the rest of exhaust is from tuning lab, but I have a catalyst converter in it. Would that affect the gain of horse power? As if rn the car seems to not have gained any hp, if anything is the whole opposite of what it was before. I do have a performance air filter. Would I need to get it programmed
2015 camaro 2/ss 6.2 liter Cat back hurst performance exhaust/ cold air intake and bully dog performance tune..
Horsepower increase?
50? More?
Any ideas guys?…
A decent programmer will run you around 400 bucks with a new cat back 3 inch exhaust/cold air intake and a tune my camaro ss has come back to life.
Love driving her.
I got a 2013 mustang GT with long tube headers and a full Rouse exhaust with a bolt on 302 Boss intake with a cold air intake how much more horse power am I getting
i have a 7,3 2000 , theres a chip, 325 h.p. stack on the side of my truck cab, flat bed, the truck WT- 7220 pounds, i get 25 miles to the gall pulling go,s to 20 to 19 depending on grade of the road, and i am with no muffler, 4inch pipe from turbo all the way out, its not much loader from a 18 wheeler, i have had state police hear it, it also gives me more power, and my pipe temp is 300 town and 600 highway at 80 mph here in nevada, so all you 7,3s out there drop your mufflers and your converters if you can, here in winnemucca theres no polution check maybe where live but not here, keep on trucking by grand funk railroad rock group of the 70,s right on man, and thats cool man, LOLS
I recently bought a Jetta GLI 35th anniversary and will like to make some upgrades. Any recommendations to improve sound and maybe gain a few horsepower or torque?
Powernation did a 347 set up and it had a “quiet” street exhaust. When they uncorked the headers it picked up 120 hp on the rear wheel dyno over the street exhaust system.