MMR Single piece crank hub for BMW N55 & S55

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.