Porsche Hastech Engineering Porsche 911 Crankcase Ventilation Oil Blow by Separator H911 106 KIT 928 341 028 37R Porsche Standard main bearing for Crankshaft Connecting Rod Set Porsche Standard main bearing for 996 (2002 2008) Porsche Brake line for the rear coupler to left brake hose fits 911 and 930 (1975 1986) models 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