This 034 Motorsport 1-Piece Crank Hub is CNC-machined from heat-treated EN36 steel and eliminates crank hub slip on high-output BMW N55 and S55 engines. It includes a billet aluminum crank bolt capture plate that locks the OE bolt in place for added security.

The kit comes with a jig, guide, locating bolt, carbide drill bit, and a new OE crank bolt for straightforward installation. Choose between pinned (4-pin) or unpinned configurations to match your build.