K & N Performance Oil Filter KN-138 This premium oil filter is built with synthetic media designed to withstand high concentrations of synthetic racing oils. It provides high-flow rates and excellent filtration to keep your engine running clean and smooth. The synthetic media supports higher flow rates for synthetic and blended oils. Featuring a 17mm hex nut (pre-drilled for safety wire) for easy installation and removal, uniform pleated synthetic filter media for high capacity, and protected by a heavy-duty canister and base plate with a double-rolled seal and pre-lubed base gasket. Key Features High-flow synthetic filter media Excellent filtration and engine protection 17mm hex nut for easy wrench removal Pre-drilled for safety wire Uniform pleated synthetic filter media Heavy-duty canister construction Double-rolled seal for leak prevention Pre-lubed base gasket