K&N Performance Air Induction Kit KN57-0151-2

The K&N Motorcycle Air Intake Kit RK-3909-1 aims to boost the horsepower and torque of your Twin Cam Harley-Davidson engine. At the centre of the kit is K&N's renowned high-flow air filter, which provides maximal air flow and superior filtration. The assembly includes a powder-coated billet aluminium back plate, eliminating the need for external breathers. It also boasts a dyno-tuned velocity stack. The combination of these features results in a massive increase to air flow.K&N Motorcycle Air Intake Kit RK-3909-1 SpecificationsEstimated Horsepower Gain: 6.05 HP @ 5206 RPMReplacement Filter: E-3972Air Filter Color: RedAir Filter Material: Cotton GauzeWarranty: 1,000,000 Miles/10 YearProduct Style: Motorcycle Intake SystemSize: 7 InchAir Filter Shape: RoundAir Filter Height: 1.625 in (41 mm)Air Filter Inside Diameter: 6.188 in (157 mm)Air Filter Outlet Shape: Not FlangedCARB EO Number: D-269-35/55Street Legal In All US States: See Vehicle ApplicationsTUV Approved (Europe): NoInlet Diameter: 2.25 in (57 mm)Overall Height: 1.688 in (43 mm)Top Style: MetalTop Material: Black Powder CoatedClamps Included: No Clamps IncludedClamp Style: No Clamps RequiredClamp Material: No Clamps RequiredWeight: 3.3 lb (1.5 kg)Product Box Height: 4.88 in (124 mm)Product Box Length: 11.75 in (298 mm)Product Box Width: 9.5 in (241 mm)Couplers Included: NoneMounting Hardware Included: YesNeck Flange: 2.25 in (57 mm)Style: Oval