Porsche Willhoit Anti Drain Back Valve And Line Kit - 911 65-71 SMC-005-022 955-572-319-01 20 (65-73) or #911

20 (65-73) or #911

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Porsche Fuel filler neck for 911 Turbo and C2/C4 models (1989-1994)

Porsche Timing belt guide plate for 924 (1987-1988)

Porsche Willhoit Anti Drain Back Valve And Line Kit - 911 65-71 SMC-005-022 955-572-319-01 20 (65-73) or #911Porsche Willhoit anti drain back valve and line kit for 911 (1965 1971) 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