High quality Racing air filter in fine-pored foam for optimal filtering. There are 2 versions available. A 20cm long form and a short form of 7cm. The only difference is in the length. The 20cm version offers a little more air flow, but installation in many is not always possible due to the longer design. Connection width: 35mm. Fits all Arreche and Dellorto 12mm -. 21mm carburettors Please select colours and length from the list. Please click the corresponding item for detailed view.