K&N HIGH FLOW DIRECT FIT AIR FILTER, RED -- Provides 1 to 4 h.p. power gain; 96 to 99 percent filtration efficiency; 8 in. height, 4.44 in. base inside diameter, 8 in. base outside diameter; 3.88 in. top outside diameter; Oiled element; Tapered conical style; Made of multiple interwoven layers of surgical cotton gauze; Increases horsepower and acceleration while providing excellent filtration; Custom designed to fit into existing air box and features a drop-in design which means adding performance is simple; Provides high air flow with excellent filtration; Economical and environment friendly; Works with OEM vehicle electronics; Will last the life of your vehicle; Washable and reusable; Lasts up to 50,000-mile before cleaning is required depending on drive condition.