Issues relating to the OE three-piece crank hub found in the S55 and N55 engine are unfortunately widely known. Thankfully, these issues are addressed with the MMR Performance one-piece billet crank hub.

Additionally, pairing the single piece crank hub with the optional MMR capture plate ensures complete peace of mind. A capture plate removes the possibility for the crank bolt to loosen with the engine’s vibrations or harmonics.

BMW S55 and N55 bolt torque: 100Nm initial torque plus 270 degrees.

Features:

• Single-piece design.
  
• Machined from heat-treated billet EN36 steel.
  
• Available to purchase with MMX capture plate.
  
• Complete kit with everything you need.

What’s Included:

• MMX Crank hub & capture plate S55 N55