BMW S85 Stroker Crankshaft

Our S85 crankshaft comes standard at 83mm of stroke. Other strokes can be custom ordered and we can assist with engineering rods and pistons to complete your custom kit. Typically we will design a kit for each specific engine build, we work with Mahle or CP pistons along with Carrillo rods to create a package that will work with the stroke that you choose. We take everything into account to design the ideal rotating assembly for your specific requirements. Whether that be lightweight high rpm road racing or a strong forced induction bottom end, we will design the rotating assembly around your requirements. The crankshaft is then balanced using the weights of the rods and pistons that we design for your specific kit. Each one of our kits is truly engineered specifically for your application. As with our other billet crankshafts these 10 cylinder cranks are plasma nitrided, and dynamically balanced. This crankshaft is the basis for our S85 stroker kit that includes custom pistons and rods.