Porsche Willhoit Anti Drain Back Valve - 911 65-89 SMC-005-020 Option:911 (1965-1971) 928 (1987-2005)

928 (1987-2005)

For use with narrow front fenders

Porsche Fuel Cap for Cayenne (2003-2006

Porsche Clear door window glass for the left side on 911 Targa (1965-1982) models

for Cayenne (2009-2010)

Porsche Willhoit Anti Drain Back Valve - 911 65-89 SMC-005-020 Option:911 (1965-1971) 928 (1987-2005)Porsche Willhoit anti drain back valve for 911 (1965 1989) models. Four cam cars, and all 911's up to 1989, have a dry sump oiling system. The oil for the engine is stored in a tank in the fender well and not in the crankcase as in a wet sump engine (like the 356). A dry sump system has several advantages: Since no oil is stored in the crankcase, the engine case can be made smaller and the engine can be mounted lower in the car, lowering the center of