VAC Motorsport Crank Hub fits BMW S55B30

A common problem with tuned S55 engines are failed crank hubs, which can result in catastrophic engine damage. With the VAC Crank hub the problem is fixed. The VAC Motorsport 4 Pin Crank Hub is more exact than OEM due to the precise engineering and CNC machining. The 4 Pin design is mechanically securing the crank hub to the crank nose and prevents the valve timing and oil pump chains from spinning independently. The total assembly was minimized from three to two pieces. As long as the bolt is properly tightened to the crank, the timing sprocket will always be in sync with the crank. Kit includes: Crank hub Keyed oil pump gear Genuine BMW crankshaft bolt Drill bit Drill guide VAC Crank Seal Guard