K&N on an 07
At WOT I can easily hear our SC whine 6 blocks away which I just love. No way that sound can be made with just a modded airbox and stock plastic tubing. Ofcourse if your not into the loud whining then modding the stock airbox is perfect.
wanna bet?? go spend the 50 bucks cut up your stock air filter to pieces and then install it...I put money you wont see a difference in hp or sound....I raced my friend cpraider and ours where identical


