Porsche Coilovers Set 911 89 94 RIV P2009S SMC 000 373 Features and Benefits:Reduces the oil 993.361.303.10.9A1 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 Porsche Window vent seal (fixed) for 911 and 912 Coupe models Porsche Coilovers Set For Porsche 911 (1989 1994) Models