The S58 engine in the F97 X3 M and F98 X4 M runs dual air intakes — one per bank — and both need high-flow filtration to reach peak breathing capacity. Dinan's four-filter kit delivers 18.6% greater airflow than stock (stock: 862 CFM per bank; Dinan: 1,022 CFM @ 28" H2O per bank), translating to measured peak gains of 7 WHP and 8 lb-ft of torque at 4,750 RPM in a completely bolt-on installation. Deep-pleated multi-layered cotton media and a steel wire mesh core provide the structural integrity and filtration efficiency to make those numbers durable, not just dyno-day results. Fits the factory airbox directly or Dinan's high-flow carbon fiber intake system (D760-0054) without modification. Set of 4.
Features:
+ 18.6% greater airflow — 862 CFM (stock) to 1,022 CFM (Dinan) @ 28" H2O per bank
+ Peak gains: 7 WHP and 8 lb-ft torque @ 4,750 RPM
+ Deep-pleated multi-layer cotton media with steel wire mesh core
+ Fits factory F97 X3 M / F98 X4 M airbox or Dinan intake D760-0054
+ Set of 4 individual filters (both banks covered)
