Evac System Check Valve

Moroso's crankcase evacuation system reduces crankcase pressure throughout the entire rpm range for increased piston ring seal reduced intake charge contamination and fewer oil leaks. They have been track and dyno-tested to produce significant increases in engine performance. These Moroso replacement check valves are direct replacement parts for the crankcase evacuation system. They will thread onto the weld-in nipple and allow you to clamp on your rubber hose that's going to the valve cover breather.