# How much HP will an exhaust add?
**URL:** https://forums.speedlife.net/t/how-much-hp-will-an-exhaust-add/254202
**Category:** Shift518 Automotive
**Created:** [August 28, 2010, 4:58pm UTC](https://forums.speedlife.net/t/how-much-hp-will-an-exhaust-add/254202 "2010-08-28T16:58:55Z")
**Posts on this page:** 20
**Page:** 1
### Author:  [@MX-5](https://forums.speedlife.net/u/MX-5)
#### Post date: [August 28, 2010, 4:58pm UTC](https://forums.speedlife.net/t/how-much-hp-will-an-exhaust-add/254202/1 "2010-08-28T16:58:55Z")
Achou asked me how much HP an exhaust would add on his 3.4L Camaro. I told him no more than 10hp but he doesn’t believe me and wanted me to make a thread. Said one of his friends put an exhaust on his V6 mustang, dyno’d it and it make 20hp more with an exhaust
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### Author:  [@tdi\_logik](https://forums.speedlife.net/u/tdi_logik)
#### Post date: [August 28, 2010, 4:59pm UTC](https://forums.speedlife.net/t/how-much-hp-will-an-exhaust-add/254202/2 "2010-08-28T16:59:53Z")
its possivble but prolly woulnt notice a difference anyways
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### Author:  [@88slowmarro](https://forums.speedlife.net/u/88slowmarro)
#### Post date: [August 28, 2010, 5:18pm UTC](https://forums.speedlife.net/t/how-much-hp-will-an-exhaust-add/254202/3 "2010-08-28T17:18:12Z")
not a thing . the motor is a weeez nutless . but semi reliable leave it alone and drive it
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### Author:  [@Dread](https://forums.speedlife.net/u/Dread)
#### Post date: [August 28, 2010, 5:31pm UTC](https://forums.speedlife.net/t/how-much-hp-will-an-exhaust-add/254202/4 "2010-08-28T17:31:11Z")
Are we talking just a cat-back or a full exhaust?
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### Author:  [@Turbo\_B18C\_EJ6](https://forums.speedlife.net/u/Turbo_B18C_EJ6)
#### Post date: [August 28, 2010, 5:31pm UTC](https://forums.speedlife.net/t/how-much-hp-will-an-exhaust-add/254202/5 "2010-08-28T17:31:33Z")
you might acutally lose hp, to make more power you need to increase fuel and increase air flow to the engine as well.
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### Author:  [@MX-5](https://forums.speedlife.net/u/MX-5)
#### Post date: [August 28, 2010, 5:32pm UTC](https://forums.speedlife.net/t/how-much-hp-will-an-exhaust-add/254202/6 "2010-08-28T17:32:33Z")
> [@2007 Ferrari International Gathering - Pics](https://forums.speedlife.net/t/2007-ferrari-international-gathering-pics/34641/11):
>
> Are we talking just a cat-back or a full exhaust?
headers and a full exhaust.
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### Author:  [@88slowmarro](https://forums.speedlife.net/u/88slowmarro)
#### Post date: [August 28, 2010, 5:33pm UTC](https://forums.speedlife.net/t/how-much-hp-will-an-exhaust-add/254202/7 "2010-08-28T17:33:53Z")
save the money man . trust me i had one of those turds . thats why i transplanted a lt1
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### Author:  [@MX-5](https://forums.speedlife.net/u/MX-5)
#### Post date: [August 28, 2010, 5:35pm UTC](https://forums.speedlife.net/t/how-much-hp-will-an-exhaust-add/254202/8 "2010-08-28T17:35:58Z")
> [@lol funny shit](https://forums.speedlife.net/t/lol-funny-shit/34639/20):
>
> save the money man . trust me i had one of those turds . thats why i transplanted a lt1
I suggested he spend another grand and pickup an LT1 car
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### Author:  [@TurboTravis](https://forums.speedlife.net/u/TurboTravis)
#### Post date: [August 28, 2010, 5:43pm UTC](https://forums.speedlife.net/t/how-much-hp-will-an-exhaust-add/254202/9 "2010-08-28T17:43:48Z")
User “MX-5”,
An aftermarket exhaust on a 3.4L GM (Chevrolet Division) Camaro would roughly add about three-fiddy (horsepower, measured at the vehicles drive wheels).
Good day,
TT
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### Author:  [@Dread](https://forums.speedlife.net/u/Dread)
#### Post date: [August 28, 2010, 5:46pm UTC](https://forums.speedlife.net/t/how-much-hp-will-an-exhaust-add/254202/10 "2010-08-28T17:46:28Z")
> [@FS: 1972 vw ...kit car](https://forums.speedlife.net/t/fs-1972-vw-kit-car/34559/58):
>
> headers and a full exhaust.
With a tune I bet its possible, I think 10-15 is probably more realistic though.
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### Author:  [@88slowmarro](https://forums.speedlife.net/u/88slowmarro)
#### Post date: [August 28, 2010, 5:53pm UTC](https://forums.speedlife.net/t/how-much-hp-will-an-exhaust-add/254202/11 "2010-08-28T17:53:43Z")
the exh isnt the bottle kneck its in the intake plenums themslelves . they are small as hell and no aftermarket support for them at all man . he should of at least looked for a 3.8 lt car . the 3.4 is the bastard child of the camaro motors thats why they stopped puttin em in
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### Author:  [@PJB](https://forums.speedlife.net/u/PJB)
#### Post date: [August 28, 2010, 6:05pm UTC](https://forums.speedlife.net/t/how-much-hp-will-an-exhaust-add/254202/12 "2010-08-28T18:05:34Z")
Its a big 2.8. Completely hopeless for making any kind of power.
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### Author:  [@TurboTravis](https://forums.speedlife.net/u/TurboTravis)
#### Post date: [August 28, 2010, 6:06pm UTC](https://forums.speedlife.net/t/how-much-hp-will-an-exhaust-add/254202/13 "2010-08-28T18:06:11Z")
> [@lol funny shit](https://forums.speedlife.net/t/lol-funny-shit/34639/22):
>
> Its a big 2.8. Completely hopeless for making any kind of power.
I had a 2.8, total garbage motor.
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### Author:  [@Alpine](https://forums.speedlife.net/u/Alpine)
#### Post date: [August 28, 2010, 6:28pm UTC](https://forums.speedlife.net/t/how-much-hp-will-an-exhaust-add/254202/14 "2010-08-28T18:28:11Z")
Okay, well what do you refer to as an “exhaust?” Ask 10 different people and you’ll get 10 different responses.
Header/Catpipe/Midpipe? Probably good for ~20whp, maybe more, maybe less.
Just a catback replacement? 5-10whp, maybe more, maybe less.
Tuning is key for unleashing HP/TQ when it comes to modifying anything that’s connected/related to the engine.
If you were to ask me, I wouldn’t touch a THING on that car’s exhaust system. It’s just not worth it. It’s such a dog and always will be a dog as long as that boat anchor of a shitty engine is in there. Our '94 firebird we used to have had 64k on that 3.4, and the headgasket went. lol
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### Author:  [@PJB](https://forums.speedlife.net/u/PJB)
#### Post date: [August 28, 2010, 6:59pm UTC](https://forums.speedlife.net/t/how-much-hp-will-an-exhaust-add/254202/15 "2010-08-28T18:59:36Z")
> [@TurboTravis"](#):
>
> I had a 2.8, total garbage motor.
I had two. The power of a 4 cylinder with the gas mileage of a v8.
They would take a beating though. Both had over 150k.
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### Author:  [@freakLS7](https://forums.speedlife.net/u/freakLS7)
#### Post date: [August 28, 2010, 8:37pm UTC](https://forums.speedlife.net/t/how-much-hp-will-an-exhaust-add/254202/16 "2010-08-28T20:37:41Z")
an exhaust is good for at least 30 wheel!!! do an intake too for a solid 50whp gain!!!
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### Author:  [@SSmokinn\_SS](https://forums.speedlife.net/u/SSmokinn_SS)
#### Post date: [August 28, 2010, 8:39pm UTC](https://forums.speedlife.net/t/how-much-hp-will-an-exhaust-add/254202/17 "2010-08-28T20:39:58Z")
it wont add more then 2hp on a 3.4
I had a 95 3.4 Camaro and my D16 civic would beat it.
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### Author:  [@SSmokinn\_SS](https://forums.speedlife.net/u/SSmokinn_SS)
#### Post date: [August 28, 2010, 8:40pm UTC](https://forums.speedlife.net/t/how-much-hp-will-an-exhaust-add/254202/18 "2010-08-28T20:40:38Z")
> [@Haha well this is one way to get your name around a company.](https://forums.speedlife.net/t/haha-well-this-is-one-way-to-get-your-name-around-a-company/34612/35):
>
> you might acutally lose hp, to make more power you need to increase fuel and increase air flow to the engine as well.
oooo really???
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### Author:  [@freakLS7](https://forums.speedlife.net/u/freakLS7)
#### Post date: [August 28, 2010, 8:40pm UTC](https://forums.speedlife.net/t/how-much-hp-will-an-exhaust-add/254202/19 "2010-08-28T20:40:41Z")
dont lie easy 30 wheel!
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### Author:  [@SSmokinn\_SS](https://forums.speedlife.net/u/SSmokinn_SS)
#### Post date: [August 28, 2010, 8:41pm UTC](https://forums.speedlife.net/t/how-much-hp-will-an-exhaust-add/254202/20 "2010-08-28T20:41:19Z")
> [@WTB: Dresser/Chest](https://forums.speedlife.net/t/wtb-dresser-chest/34643/5):
>
> With a tune I bet its possible, I think 10-15 is probably more realistic though.
they dont even tune those cars…
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