Thread: stock V8 mufflers on a gtp

Haha, our mufflers flow just fine. It's not the catback that has flow issue, it's the DP and front exhaust manifold. THOSE are the problem areas and no muffler is going to change that. You want to help flow, get a 3" DP and a PLOG & ported rear mani

The system on my 2006 G/T with the polished tips comming out the back, the nice set with 4 chrome tips, rocks. I think its the best sounding passenger sedan I've been around ((with stock system))

I take that back: Remeber the old pontiac tempest / chevy corsica with a V6 sounding really mean stock I think it had a 2.8 engine

Originally Posted by chunky

has anyone ever put other OEM mufflers on their GTP? like from a v8 car so that it's still quiet and doesn't sound like **** like most aftermarket exhausts for out cars (the exhaust manifold's fault, nothing we can do about it.) but has a better flowing muffler.

i was thinking from the V8 gtps, stang, camarro, lexus or some other car with a V8.

stock muflfers are good for 300+ horsepower. are you putting out at least that much?? if not, your stock mufflers are flowing just fine

if you want more power, remove your catalytic converter. if you wanna do absolutely nothing for your cars performance, replace the mufflers

Originally Posted by Jakegday

stock muflfers are good for 300+ horsepower. are you putting out at least that much?? if not, your stock mufflers are flowing just fine

if you want more power, remove your catalytic converter. if you wanna do absolutely nothing for your cars performance, replace the mufflers

Stock catback is good for 350 FWHP before having flowing issues...pretty sure the OP doesn't have 350 WHEEL horsepower. Only exhaust mods that actually increase performance are either headers/downpipe/u-bend delete or the PLOG...the converter in these cars nets you nothing when you delete it. Proven. If you want more power by doing exhaust mods...just get headers...and throw mufflers on it if you want a different tone. Keep the resonator...because if you get rid of it...it'll sound like ass.

My borla mufflers flow a lot better. Almost 2 mpg gain and they sound great

Originally Posted by rocafella2032

My borla mufflers flow a lot better. Almost 2 mpg gain and they sound great

haha, liar. you did not get 2 MPG from mufflers.

Originally Posted by gtpinsc

flowmaster 40 series DO NOT sound like crap.

dont lie.

Originally Posted by chunky

is the firing order different on the camaros because there is a huge difference in the sounds of these cars.

they are able to put equal length headers on it. we have a crossover to bring the front manifold to the back. uneven exhaust pulses FTL.




also, can someone explain to me what the differences between v8 and v6 mufflers are? a muffler is a ****ing muffler.

Originally Posted by Bio248

also, can someone explain to me what the differences between v8 and v6 mufflers are? a muffler is a ****ing muffler.

8 is a bigger number than 6 so it is better. noob

Originally Posted by rocafella2032

My borla mufflers flow a lot better. Almost 2 mpg gain and they sound great

Probably drove more on the highway.

Originally Posted by gtpinsc

flowmaster 40 series DO NOT sound like crap.

Originally Posted by chunky

have a video of a nice sounding one, because IMO this YouTube - 2004 pontiac grand prix gtp supercharged 3.8L V-6 does not sound good. i do not like raspy exhausts.

That is because the resonator is gone...plus you need more exhaust mods to compliment flow 40's.

YouTube - GTP Exhaust

Originally Posted by 01GTP

8 is a bigger number than 6 so it is better. noob

Which equates to 2 more MPG's like that guy up top got...must have installed V8 mufflers...

Originally Posted by Bio248

haha, liar. you did not get 2 MPG from mufflers.



dont lie.

im not lying? i went from 17.6 to 19.5 on avarage driving.

Here's my exhaust video.

YouTube - 1998 Grand Prix GT - L32 Exhaust Note