Most factory air boxes are made to reduce induction noise by adding some designed length tube(s) to create resonance to cancel a particular type of noise (frequency).
Open your stock EP3/DC5 air box, you will know what I mean. Feel free to apply mod suggested by Hondata website, can gain 2-3 HP for free.
DC2R stock air box is simpler, more noise :D作者: 178654837 时间: 2012-8-22 22:24:06