K&N Engineering knn63-1116

The K&N AirCharger intake for 2008–2013 BMW M3 4.0L V8 uses a roto-molded HDPE intake tube and an oiled, washable High-Flow air filter to increase airflow and deliver measurable gains in horsepower and torque. The oversized conical filter can allow up to 100,000 miles between services under normal highway use; a custom heat shield is included, installation typically takes under an hour, and the system is backed by K&N's No‑Hassle Lifetime Limited Warranty. Check CARB status for legal applicability on your vehicle.