Porsche Hastech Engineering Porsche 911 Crankcase Ventilation Oil Blow by Separator H911 106 KIT 616 107 015 00 Porsche Complete transmission gasket repair kit 166 820 04 74 Porsche Complete transmission gasket repair kit for 914 4 and 914 6 models 1978 1988) 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 Fits all aircooled Porsche 911 models from 1965 through 1998