Give your BMW E31 the performance it deserves with the OS Giken SuperLock LSD

a trusted name among engine builders

- 1/8 NPT fitting for a temperature sensor to monitor fluid temperature

Knock Control – Now included to enhance tuning and engine safety

5150 bearings have demonstrated exceptional longevity and performance

B48 Block Sleeving Service SC7650 Give your BMW E31 theB48 Engine Block Sleeving Service When it comes to unlocking real performance and long term durability from your BMW B48, the factory spray on iron cylinder coating simply isnt up to the task. Our precision sleeving service replaces those limitations with a robust, high strength solutionturning your engine block into a foundation built for serious power. Why Sleeve Your B48 Block? The OEM coating was never designed for high boost or high horsepower