Chef

hello, next step putting in exhaust (spring project), im looking for HP, not noise. whats the best choice?

hawgman

Longtube headers, high flow race cats, and factory mufflers.

Kaldar142

LAWL, im currently running o/r h-pipe with stock mufflers, it sounds sweet, i've got hooker long tubes sitting in my garage that i plan on fabricating to fit.

jdback19

You didnt like that offroad h-pipe and slp setup Kaldar?

Speedyejl

Your going to get the best gains with a system that has no restriction

ie: LTs/ No Cats/ No Muffler

This of course will be pretty loud. Glass packs probably would be the best way to get noise down without introducing any resistive.

JGT

I would have to agree with hawgman. Most of your power will come from the longtubes (15-20 HP?), then midpipe change (5-10 HP?), then the muffler (1-2 HP?)

Everyone seems to agree that aftermarket mufflers don't add much horsepower, and although going catless would maybe give him an extra 5 horses over high flow cats, it would also make the car much, much louder, which he doesn't seem to want.

If he doesn't want it too loud, he is better off keeping his stock mufflers (or some other relatively quiet aftermarket muffler) and going with high flow cats on the midpipe (I would recommenda catted Prochamber, they are supposed to be quieter than H's), along with whatever longtubes he wants.