In Reply to: KN drop in filter... posted by M3 EVO on February 13, 2000 at 04:38:39:
I have a K&N Drop in Filter but I don't think it's really much worth it. It helps very little on high end, slightly louder after 3500rpms, and I probably gain 1hp to the rear wheels!
Boston Performance Group sells ITG Drop In Filters for $36 which are much cheaper than the K&N ones.
Anyone else here have a ITG drop in Filter on the E36 M3?