Hey guys i'm modding my 2004 grand prix gtp just a few quick questions...
Heres what i'm doing to it...
-TOG Xtreme exhaust Headers
-3.6 Pulley
-Hogan High performance cat converter down pipe
- Motorsport Cold air intake
-mufflers...cat back is too much for to little of hp i would get
-And of course a tune instead of a pcm.

with these Tog Xtreme headers vs. SLP headers which is better? fits better?
Cai- ? modded stock box work just as well? or best idea to get a cold air?

info on the headers would be very nice..

i realize its a fwd car but its my very first car and i love it.

any help would be appreciated, thank you very much