Evolve Pinned Crank Hub Kit - S55 / N55

Engineered for BMW S55 and N55 engines, the Evolve Pinned Crank Hub Kit is the definitive solution to a well-known weak point in the OE design. Factory crank hubs are prone to “slip” or “spin,” especially on tuned applications—and occasionally even on stock cars—leading to costly repairs ranging from retiming to full engine rebuilds. Precision-crafted in the UK from EN36 heat-treated steel, a material trusted in the manufacture of high-performance crankshafts for both automotive and aerospace applications, this kit is built for uncompromising durability. The Evolve 2-piece, 4-pin design integrates seamlessly with the OE crank, offering unmatched security and confidence under extreme conditions. The included drill bit and alignment guide ensure precise installation by a trained professional, making this a must-have preventative upgrade for performance enthusiasts, track drivers, and discerning BMW owners who demand both protection and performance. Safeguard your investment and experience peace of mind—without compromise. Product Details: EN36 heat-treated steel construction for ultimate strength and durability 2-piece, 4-pin design for superior OE crank engagement Drill bit and precision alignment guide included Designed and manufactured in the UK Professional installation recommended