K&N Oval Red 9in Intake System for Harley Davidson

K&N's RK Series was developed to get more horsepower from your Twin Cam Harley-Davidson engine. Built around the legendary K&N High-Flow Air Filter, the this RK Series assembly includes an innovative powder coated billet aluminum backplate that eliminates external breathers and features a built-in, dyno-tuned velocity stack. The result is a significant airflow increase to the engine without sacrificing filtration. This RK Series assembly retains a factory appearance by utilizing the stock air cleaner cover. The RK-3910-1 comes with a larger air filter and longer spacers than the RK-3909-1.Installation InstructionsUser 1Installation InstructionsThis Part Fits: Year Make Model Submodel 1999-2007 Harley Davidson FLHR Road King Base 2007 Harley Davidson FLHRC Road King Classic Base 2002-2006 Harley Davidson FLHRCI Road King Classic Base 2003-2006 Harley Davidson FLHRI Road King Base 2004-2007 Harley Davidson FLHRS Road King Custom Base 2004-2006 Harley Davidson FLHRSI