NRW Design 1-Piece 4-Pin Crank Hub - BMW F80 M3 | F82 | F83 M4 | F87 M2 Competition / M2 CS (S55)

Upgrade your S55 with NRW Design’s one-piece crank hub, which adds four pins to the design. It is machined from 8620 steel, heat treated and zinc plated after machining, with design and tolerances based on the OEM structure and ANSI sprocket standards.

The kit includes everything needed to drill and pin the crankshaft, including a drill guide, drill bit and a new OEM crank bolt.

Please note: Professional installation is highly recommended – the pin holes must be drilled into the crankshaft, and hole size and positioning are critical. Incorrect drilling can result in failure of the part and possible engine damage. The warranty covers part defects only, not engine failure caused by incorrect installation.

Features

• One-piece hub with four added pins
• Machined from 8620 steel, heat treated and zinc plated
• Design and tolerances based on OEM structure and ANSI sprocket standards
• Precision machined on a 4-axis CNC
• Kit includes: crank hub, OEM crank bolt, 5/32" drill bit, drill guide and drill guide hold-down bolt
• Fits all S55 applications

Fitment

• BMW F80 M3 (S55)
• BMW F82 M4 Coupe (S55)
• BMW F83 M4 Convertible (S55)
• BMW F87 M2 Competition (S55)
• BMW F87 M2 CS (S55)