K&N Engineering K&N 4in ID / 5.25in OD / 2in H Custom Assembly Filter designed to fit Harley-Davidson Motorcycles RK-320B

KN Motorcycle Direct Fit Air Filters

Air Cleaner Assembly

The K&N custom air cleaner below was designed to fit Harley-Davidson motorcycles. This K&N air cleaner is not street legal nor recommended by Harley-Davidson Motor Co., Inc. K&N custom air cleaners can increase horsepower with proper carburetor calibration. For stock K&N replacement filters that fit Harley-Davidson motorcycles, see our application search.

This K&N custom air cleaner was designed to fit Harley-Davidson motorcycles. This K&N air cleaner is not street legal nor recommended by Harley-Davidson Motor Co., Inc. .