Thread: stock V8 mufflers on a gtp

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...