After racing my 5.7 hemi at two different tracks and 30 quarter mile passes after each mod...these are real world gains/not dyno tests.CAI&3''exhaust (2-3tenths)then add Diablo tuner (3-4tenths)then add Modern Muscle 85mm ported throttle body (1-2 tenths) picked up (7-8 tenths total). NONE of these mods affected or hurt the stock type drivability...if anything it runs smoother NOW I'll put the 3.55 gears in....that should wake it up even more..