K&N HP-7001 High Performance Oil Filter Heavy-Duty Construction for Extreme Conditions Sturdy Wrench Nut Makes Oil Filter Removal Quick and Easy Resin-impregnated Filter Media Provides Maximum Filtering Surface for Contaminant Removal Anti-drainback Valve (where applicable) Eliminates Dry Starts, Prevents Oil from Draining back into Crankcase during Engine Shutdown Drilled Safety Wire Holes for Racing