S55 Keyed Crank Hub Kit

The BMW S55 Keyed Crank Hub Kit from CarBahn Autoworks is designed to address a known issue in the S55 engine where the timing chain sprocket can spin on the crankshaft, leading to camshaft timing deviations. This kit pins the cam sprocket to the crankshaft, preventing slippage, especially when the engine is modified for increased boost or power.

The kit includes the keyed hub, crank bolt, a drill, drill fixture, and drill fixture bolt. The metallurgy is noted as superior to many aftermarket sprockets, and the components are machined and pinned to OEM gears and hubs to prevent the original flawed design from causing issues like rough running or camshaft angle deviation faults.