K&N Filters 57-2589 57i Series Induction Kit Fits 15-17 MustangAir Intake Kit 57i Series Induction Kit 57i Series Induction Kit; Incl. Air Filter Heat Shield Tubing; Estimated Horsepower Gain 15. 72 HP At 4224 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: 5 Clamp Style: Worm Gear Coupler Color: Black Couplers Included: 2 Estimated Horse Power Gain: 15. 72 HP @ 4224 RPM Filter Color: Red