K&N Filters 57-2599 57i Series Induction Kit Fits 17 F-150Air Intake Kit 57i Series Induction Kit 57i Series Induction Kit; Incl. Air Filter Heat Shield Tubing; Estimated Horsepower Gain 12. 30 HP At 4915 RPM; SPECIFICATIONS: Air Box Included: No Air Filter Element Washable: Yes Air Filter Outlet Shape: Round Clamp Color: Natural Clamp Material: Stainless Steel Clamp Quantity: 7 Clamp Style: Worm Gear Coupler Color: Black Couplers Included: 3 Estimated Horse Power Gain: 12. 3 HP @ 4915 RPM Filter Color: Red