At the heart of this BMW S54 Stroker Kit is the 5150 AutoSport 4340 Billet Steel Crankshaft

or competition-level racing

Supertech valve spring kits feature high-quality springs made from premium materials

and electronic devices such as ECUs and data acquisition systems

B58 3.2L Stroker Kit by 5150 AutoSport gatT131RB At the heart of thisBMW Toyota B58 Gen 1 & 2 Stroker Kit by 5150 AutoSport Bigger displacement, more torque and more power; Our 5150 AutoSport Stroker Kits are specifically designed for BMW & Toyota B58 Engines. 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