MMR BMW S55 1 Piece Crank Hub (M2 Comp/M3/M4)

MMR BMW S55 1-Piece Crank Hub is an essential modification for the S55 engine. It's no secret that the S55 is prone to spinning it's crank hub resulting in quite a hefty repair bill. Once the crank hub spins, the engines timing is completely thrown off resulting in pistons hitting the valves and complete engine failure. Investing in preventative maintenance could make all the difference!

As a preventative measure, MMR have developed this one piece crank hub upgrade to ensure the friction plates cannot slip, delivering a substantial improvement in reliability versus the OE version. 

The MMR Performance one-piece crank hub is machined from billet EN36 that's been heat-treated with a 0.75mm case hardening, making it incredibly strong and durable. Combine this product with the MMR S55 crank hub capture plate for the ultimate solution.

- Machined from billet EN36
- Heat-treated with a 0.75mm case hardening for strength & durability
- Fits MMR's crank hub capture plate

- BMW F87 M2 Competition Coupe (2018-2021)
- BMW F80 M3 Saloon (2014-2019)
- BMW F82/3 M4 Coupe/Convertible (2014-2019)

- 1x MMR S55 1-piece crank hub

All in stock products ship the same day if ordered before 2pm GMT

For out of stock items we will contact you with an estimated wait time if not otherwise specified above.

We offer worldwide shipping on all products. If upon receiving your product you wish to return; we offer a 30-day returns policy. For our in-depth returns information please follow the link. "R44 Returns Policy

All of our products come with a standard warranty of 1-3 years. This is dependant on the type of product however. For more details please see our warranty page here.