How to clean and reoil a K&N air filter using a Focus XR5 Turbo / ST225 air filter as example.
Step by step by OEM Denied Performance.
K&N cleaning kit part numbers:
Aerosol oil & small cleaner 995000
Aerosol oil small can 990504
Aerosol oil larger can 990516
Cleaner small spray bottle 990621
Cleaner 1 Gallon drum 990635