Arlen Ness Stage I Big Sucker Air Filter Kits for 1999-17 Harley Twin Cam - No Cover - 18-507 MPN_79-1101 1989 Polaris Star 250

1989 Polaris Star 250

2004 Harley-Davidson Softail Fat Boy - FLSTFI

2000 Yamaha YFM80

Part Number: W4894

2002 Professional Series 500 6x6 LUH

Arlen Ness Stage I Big Sucker Air Filter Kits for 1999-17 Harley Twin Cam - No Cover - 18-507 MPN_79-1101 1989 Polaris Star 250Arlen Ness Stage I Big Sucker Air Filter Kit Engineered and proven to give your engine maximum airflow for more horsepower & torque The Big Sucker kits are designed to be used with the stock outer air filter cover or an Arlen Ness custom outer cover One piece aluminum backing plate features patented hidden breather technology Each hidden breather is O ringed at the heads and exits at the mouth of the injector carb to provide efficient engine