Upgrade your BMW S65 with this premium valve kit and experience the difference in performance that comes from using top-tier components

our stroker kits have stood up to the tests and trials of high horsepower applications time and time again

BMW S14B20

Install the head gasket on the engine block and ensure that it is properly aligned

The result: an extremely efficient core with a proven 30°F (16

Mahle Motorsport PowerPak Piston Set, BMW S85 Bore Size:92 mm Upgrade your BMW S65 withThe MAHLE Motorsport PowerPak kit is their high volume shelf stock program developed for high performance enthusiasts. PowerPak pistons are made from 4032 aluminum alloy to allow for tighter cylinder to wall clearances and improved temperature stability. PowerPak Features: Forged piston for performance applications Fully machined crown Grafal anti Friction coating on skirts reduces drag, scuffing, friction and cylinder bore wear; reduces piston noise.