i have a gsr wit nuttin but a cai and a 2.25 headers back exhauast. But i am not dat brite when it comes to what i need to do to gain more torque and hp so i am asking anybody who knows what they are talkin about to give me some ideas or suggestions on what i should.

 

Higher Compression Pistons, maybe sleeve your deck to a bigger bore for more displacement...

Some upgraded cams/cam gears...