K&N Replacement Air Filter (33-2881) BMW > 4 Series > F32/F33/F36 Coupe/Convertible/Gran Coupe 2016-2019 M440i (B58) only needs cleaning every 100k

only needs cleaning every 100k miles under normal highway conditions

the Forge adjustable rear tie bars for various Mini models

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

Peak gains of 25bhp

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

K&N Replacement Air Filter (33-2881) BMW > 4 Series > F32/F33/F36 Coupe/Convertible/Gran Coupe 2016-2019 M440i (B58) only needs cleaning every 100kK&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