K&N Replacement Air Filter (33-2881) BMW > 4 Series > F32/F33/F36 Coupe/Convertible/Gran Coupe 2016-2019 M440i (B58) This product is designed

This product is designed

Whilst the factory set up using the two intercoolers in parallel is reasonably efficient

only needs cleaning every 100k miles under normal highway conditions

Inside diameter: 30mm (1 3/16")

Peak gains of 25bhp

K&N Replacement Air Filter (33-2881) BMW > 4 Series > F32/F33/F36 Coupe/Convertible/Gran Coupe 2016-2019 M440i (B58) This product is designedK&N washable, reusable High Flow Air Filters feature a state of the art design of layered, oiled cotton media engineered to improve airflow and capture contaminants, and are designed to provide an increase in horsepower. Each performance air filter is reusable, engineered to last for the entire lifespan of your vehicle, and backed by K&N's No Hassle Lifetime Limited Warranty. K&N drop in replacement filters are designed to install easily into your