Peterson Fluid Systems Inline Pop-Off Valve -12AN 3550224-17- M This smaller size diameter button

This smaller size diameter button shows the 9-bolt pattern for a high tech performance look

Once the engine starts or when the key is released the timing returns to the set mechanical amount

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20 in Wide Seat

Integral Shock Mounting Holes

Peterson Fluid Systems Inline Pop-Off Valve -12AN 3550224-17- M This smaller size diameter buttonBreather assembly is installed in line from engine's crankcase. Valve seals engine from air entering engine, but opens in the event of crankcase pressure, allowing crankcase to vent. 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