Porsche Wiper Switch, 911 1989 1994 9646133190301C 91135606603 Features and Benefits:Reduces the oil Designed specifically for Porsche Features and Benefits:Reduces the oil blow by from the crank ventilationKeeps the oil in the engine while still allowing good crank ventilationVery simple mounting sandwiches between the crankcase and ventilation the lid breather coverUsed on all Hastech race & street enginesRecommended for all aircooled Porsche 911 engines to help reduce oil consumption caused by ingestion of oil laden air into the intake caused by excess crankcase windage and blow by The new RennShift G50 has all the great characteristics of the much loved previous version with additional improvements Wiper Switch for 911 (1989 1994)