hey all you out there with the GMPP Sport catback, did you feel any difference when you put it on, and do you know what kind of gains i can be expecting with this. i got a great deal on one and im just wondering what i can expect.thanks

 

From what ive been hearing they are a nice little add with an increase in sound with the full exhaust. With the full exhaust plus a dp im guessing around 15-20hp..There is alot of posts on here about the GMPP sport catback if u look.

 

search GMPP Catback Dyno Results there is a vid by JonyyB.

He got something like 12hp out of it

 

k sorry for not searchin my bad

 

On my car with the stage 2 , CAI, and the 2.8" pulley. I noticed it made a nice difference in seat of the pants feel, maybe becuase my stock exhaust was so restrictive with that small of a pulley, but i really wasnt expecting much and it was noticable for me, mid you it may not be as much with a stock car but supposed to be worth 12whp

 

hea tru, what size injectors u runnin

 

intake and stage 2, when i added my exhaust the gain was definately noticable.

Quite more noticable than the intake IMO.

 

42lbs from the gm stage 2 kit is what i am running, i am pushing alot more boost than stock though so your gains may not be reflective of mine, but mine was definately noticable

 

yo u gotta be careful running 2.8 with the 42.5's i heard