Originally Posted by BrianBrave
That pulley, without a tune won't provide you any "wow" factor. (as you have experienced) and the Code3 intake will only make significant power with the hood up.
So yes - you'll need to modifiy your stock air boxes or buy an aftermarket intake.
Then get a dyno tune...
gotta disagree brian. i ran my c3 without any other mods except cooling and i felt a tremendous difference. the low end torque was evident. no add a tune and its amazing!