Project S4: K&N Air Filter

Having had great success with a simple air filter swap from the OE manufacturers paper unit, to a high-flow replacement panel filter before, we’ve decided to fit a K&N High-Flow FilterCharger┬« version to the Project S4 (www.knfilters.co.uk). I have dyno checked panel filters versus cold air induction kits of a number of different project cars Read more about Project S4: K&N Air Filter[…]