BMC Air Filter FB01090 – BMW X3 M (F97) & X4 M (F98)High Flow Panel Filter Kit for BMW S58 X3 M & X4 M The BMC Air Filter FB01090 is a precision drop in full kit for the BMW X3 M (F97) and X4 M (F98), including Competition models. Built with BMCs one piece Full Moulding red rubber frame and multi layer oiled cotton gauze reinforced by an epoxy coated alloy mesh, it improves intake efficiency while filtering particles down to ~7 microns (tighter than typical OEM paper at ~10 m). Washable, reusable, and