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F44 M235i & F39 X2 M35i
ensuring optimal fit and function
The V1 design features a smooth and consistent design
The easy bolt-on installation ensures a hassle-free upgrade
4V31 - Engine no
MMX BMW S55 & N55 Single Piece Crank Hub Upgrade 335i (F30/F31/F34)(P) F44 M235i & F39 X2The MMX Single Piece Crank Hub Upgrade is the ultimate solution to the well documented crank hub failures affecting BMWs S55 and N55 engines. Designed with a 4 pin dowelled single piece design, this upgrade eliminates the risk of the factory three piece hub slipping a known cause of catastrophic engine failure in M2, M3, M4, and N55 powered models. CNC machined in the UK from heat treated billet EN36 steel with 0. 75mm case hardening, the hub offers