RK BMW S55 F80 F82 F87 Billet Pinned Crank Hub Upgrade Kit - M2 Competition, M3, M4
The RK BMW S55 Billet Pinned Crank Hub is the essential S55 crank hub upgrade for anyone seeking a reliable S55 crank hub fix to prevent a spun crank hub and protect engine timing on tuned BMW M2 Competition, M3 and M4 models. This 4 pin pinned crank hub is a direct replacement for the OEM hub and has been laser scanned for perfect fitment, then CNC machined from heat treated 4130 chromoly for outstanding strength and durability. Designed and machined in-house on a HAAS 4 axis CNC mill, this S55 crank hub solution delivers the confidence you need for fast road, track days and drag racing.
- 4 pin design prevents hub rotation and timing slip, even on heavily modified S55 engines
- Billet 4130 chromoly construction for exceptional strength and reliability
- Laser scanned for perfect OEM fitment and precise alignment
- Direct replacement for the stock S55 crank hub
- Designed and machined in-house on a HAAS 4 axis CNC mill
- Drill bits included in the kit for professional installation
Proven performance: tested on Viper, a 750 bhp F80 M3, for over a year with 50+ Dragy runs and two VMAX events. The clutch slipped before the crank hub did. We have fitted and used this pinned crank hub on customer cars and feedback has been excellent for timing stability and long term reliability.
Note: A new crank bolt is required from BMW and is not supplied in the kit.
Why upgrade your S55 crank hub
If you are tuning your BMW M2 Competition, M3 or M4, a pinned crank hub upgrade is a must to prevent the common S55 spun crank hub issue. This RK Billet Pinned Crank Hub locks the crank hub to the crankshaft with a robust 4 pin solution, maintaining accurate engine timing under high torque, aggressive launches and hard track use. Ideal for high horsepower S55 builds, track day cars and daily driven M cars that demand reliability.
Keywords many enthusiasts search for: BMW S55 crank hub, S55 crank hub fix, S55 pinned crank hub, S55 crank hub upgrade, BMW M3 crank hub, BMW M4 crank hub, BMW M2 Competition crank hub, F80 crank hub, F82 crank hub, F83 crank hub, F87 crank hub, chromoly crank hub, billet crank hub, 4 pin crank hub, anti spin crank hub, crankshaft hub, timing hub, UK crank hub solution.
Compatibility - BMW S55 engine
Compatible with all S55 M models:
- BMW M Series F87 LCI M2 Competition (2018+)
- BMW M Series F80 M3 Saloon S55 (2012-2015)
- BMW M Series F80 LCI M3 Saloon S55 (2015-2018)
- BMW M Series F80 LCI M3 CS S55 (2016-2019)
- BMW M Series F80 LCI M3 Competition S55 (2016-2019)
- BMW M Series F82 M4 Coupe S55 (2013-2017)
- BMW M Series F82 M4 GTS Coupe S55 (2013-2017)
- BMW M Series F82 LCI M4 Coupe S55 (2016-2019)
- BMW M Series F82 LCI M4 CS Coupe S55 (2016-2019)
- BMW M Series F83 M4 Convertible S55 (2013-2017)
- BMW M Series F83 LCI M4 Convertible S55 (2016-2019)
Installation and fitting
Professional installation is strongly recommended. Fitting is available at Nforcd in Warwickshire. Request a fitting quote by emailing Sales@nforcd.com. Drill bits are included in the kit. A new OEM BMW crank bolt is required but not included.
Part number
RKS55CRANKHUB
Buy with confidence from Nforcd. This RK S55 crank hub upgrade is the trusted solution for BMW M2 Competition, M3 and M4 owners who want a permanent fix to S55 crank hub issues, improved timing stability and peace of mind for tuned and hard driven cars.