Standard Size is 32mm Intake / 28mm Exhaust

Step 1: Tighten to 30 ft-lbs

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

or demanding track use

Squeeze every horse power out of your BMW S65 engine with our Engine Block Sleeving Service

BMW N63 4.8L Stroker Kit by 5150 AutoSport Piston Bore:89 mm Standard Size is 32mm IntakeBMW 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