Performance air filters

[archyman]

That restriction could be the reason why my engine is less responsive at low rpm...along the z9 IM off course.
Will check the condition of the filter soon and will know

[saxophonias]

I've just ordered a K&N 33-2104 air filter to my D15 airbox. I don't expect so much change, but maybe it will have a bit deeper induction sound, and better reaction

One noticeable change I saw was when I had disabled the resonator box to my d14 stock airbox. These days I am tempted to try an integra dc1 airbox with one open cone filter inside to see the difference if any with my apexi dry open filter