Unlock the full potential of your BMW S55 or N55 engine with the MMX Performance One-Piece 4-Pin High HP Crank Hub Upgrade Kit—engineered for those who demand uncompromising performance and flawless reliability. Designed to address the infamous crank hub failure that plagues high-powered BMW engines, this precision-crafted solution transforms your build into a fortress of strength, ensuring your investment is protected at every RPM.
Crafted in the UK from billet EN36 steel and case-hardened for extreme durability, the MMX hub is a masterpiece of motorsport engineering. Aerospace-grade dowels mechanically lock the hub to the crank, eliminating slippage and restoring absolute confidence under relentless power. Paired with a professional-grade installation jig and optional Capture Plate, this upgrade embodies luxury performance—where innovation, engineering, and peace of mind converge.
Product Details
- Designed for BMW S55 / N55 engines (M2, M3, M4, 335i, 435i, etc.)
- One-piece CNC-machined crank hub – Billet EN36 steel with 0.75mm case hardening
- 4 aerospace-grade precision dowels lock hub to the crankshaft
- Includes brand new OE crank bolt for secure installation
- Professional installation kit: bolt-on drilling guide, location bolt, HSS high-speed drill bit
- Eliminates crank hub slip common with OEM three-piece design
- Optional Capture Plate for ultimate long-term security
- Recommended for builds exceeding 700HP
