Four digital inputs

This precision-crafted set ensures valvetrain stability

renowned for its exceptional quality

and S52 iron block engines in E34 and E36 chassis

Viton Valve Stem Seals, BMW B48 64931S Four digital inputsViton Stem Seals for High Performance BMW B48 Engines Viton Stem Seals are engineered to prevent oil from entering the combustion chamber, ensuring optimal engine performance. Crafted from premium Viton material, these seals offer superior control and durability across the entire RPM range. Their compact design allows for clearance in small inside diameter valve springs. Developed to withstand the extreme conditions of high horsepower and turbocharged