renowned for their engineering and versatility

Breakage can result in valves dropping into the combustion chamber

Step 1: Tighten to 30 ft-lbs

and street/strip applications that push engines to their limits

from subtle improvements for street builds to aggressive profiles designed for high-performance racing

BMW N63 4.8L Stroker Kit by 5150 AutoSport Piston Bore:89 mm renowned for their engineering andBMW N63 Stroker Kit by 5150 AutoSport Bigger displacement, more torque and more power; Our 5150 AutoSport Stroker Kits are specifically designed for the BMW N63 Engine. Benefits of Stroking an Engine: Higher displacement offers greater power output and torque from increased cylinder volume and improved air fuel mixture combustion Longer crankshaft stroke increases connecting rod leverage for increased torque output at lower RPMs Improved throttle