Direct-fit replacement filters for the aFe Momentum ST intake (50-40045R/D) on F85 X5 M and F86 X6 M - no factory airbox, no adapters, no guesswork.
Pro 5R (24-90109-MA): five-layer pre-oiled cotton gauze - track day and fast road proven, higher airflow than stock, retains filtration integrity under sustained high-RPM load
Pro DRY S (21-90109-MA): oil-free synthetic media - zero-mess servicing, ideal for daily driver or show car use where consistency and cleanliness matter
External locking tabs + rigid polyurethane frame - secure fitment, no movement at 7,200 rpm, no silicone or clamps needed
Washable, reusable, serviceable with aFe’s official cleaners - built for repeated use, not one-off upgrades
Searches we match: F85 air filter, F86 S63 decat intake filter, stage 1 BMW M air filter, aFe Momentum ST replacement, Pro 5R F85, Pro DRY S F86, S63 fast road filter, track day air filter BMW, washable S63 intake filter.
