Breather assembly is installed on engine's crankcase in vacuum condition. Valve seals engine from air entering engine, but opens in the event of crankcase pressure, allowing crankcase to vent. Comes complete with -12 AN bung, to weld to aluminum valve cover, and filter.

Peterson Fluid Systems is the choice of champions for wet and dry sump oiling systems. Peterson Fluid Systems offers a complete system from their class leading oil pumps to their championship winning oil tanks, oil and fuel filters, and accessory drives. Peterson Fluid System products have been proven in NASCAR, NHRA, IHRA, IRL, World of Outlaws, USAC, and many other types of racing world wide. Peterson Fluid Systems is constantly refining and evolving their product based of real world racing experiences and suggestions from racers.

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