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..

 

Keep us posted.....sounds like you are really waking up your Challenger!
(And, thanks for the breakdown on each of the Mods.....)

 

There's no getting around the Challenger's considerable mass, which imparts a commanding feel on the highway but becomes quite evident on tight roads. Although sportier Challengers are capable by the numbers, they feel big and heavy when driven like sports cars.