im lookin for a full exhaust system and a C.A.I. for a 07...does anyone know which 2 add the most H.P.?

 

there all the same...pick your color and brand!

 

You should think about what you want to do with your car in thew future before you just ask which add the most hp. Most are about the same power, but the size of the exhaust will determinethe kind of power you will be able to make down the road. also think about any need for warranty before you buy. I have the injen intake and gm sport exhaust on my 07 ss/sc.

 

Vibrant has a very nice header back exhaust setup that has shown some nice gains. The intake will depend on you. There is a company on here that has a deal going now for a throttle body spacer and 3" CAI for a pretty nice price. Then you pick up a 4.2 Colorado or Trailblazer throttle body and hook that up in place of your factory one and you're set...

 

Intakes are all basically the same. I personally have an Injen. As far as exhaust my ZZP mid-length header (1 3/4 in primaries) and 3" DP combo is mated to a 2.5" Magnaflow cat-back. Sounds pretty damn nice and you will notice it with the butt dyno.