Porsche Poly Steering Rack Bushings 964 993 89 98 RS 161 64434192 full color studio photography Others:ATE (OEM) full color studio photography 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 These bushings are made with a higher grade polyurethane and the molds are more precise providing a near perfect fit which is much easier to install then previous versions Porsche The steering in 964 993 cars has always felt squishy as a result of the steering rack not being firmly mounted to the chassis as it is in the earlier 65 89 911 and later model 996 997 cars