Has anyone installed a K and N air-filter to a Sigma 4/4? I'm assuming the air-box is a standard Ford item so wondered what panel filter I'd need to order - ie Fiesta or Focus. Or the K and n part number?
Thankyou
2015 Morgan 4/4 (Wolf fettled) previously 2014 M3W MINI Cooper S and numerous BMC/BL relics.
