Specifically designed to withstand the high concentrates of synthetic racing oils. Uniform pleated synthetic filter media provides high capacity and outstanding filtration. Large filter media provides high-flow rates and outstanding oil filtration. Protected by a heavy-duty canister and base plate, with a double-rolled seal. . . Check-valve/anti-drain back prevents oil drain-back and dry starts*. Pre-lubed base gasket for optimum seal*. 17mm hex nut allows easy-on, easy wrench-off*. Pre-drilled for safety wire security*. *where applicable. Pre-lubed base gasket for optimum seal*. 17mm hex nut allows easy-on, easy wrench-off*. Pre-drilled for safety wire security*. K&N limited warranty. *where applicable. Black