WARNING: This product can expose you to chemicals that are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information, visit www.P65warnings.ca.gov.Choose Between The Following SKU's Above: MMR20-1003FK, MMR20-1001.
The MMX Performance One-Piece Crank Hub Kit is the ultimate solution for BMW M2 Competition, M3, and M4 owners looking to eliminate the well-known issues with the OE three-piece crank hub in S55 and N55 engines. Designed to prevent friction plate slippage, which can lead to costly engine damage, this billet crank hub ensures superior reliability whether your car is factory-tuned or heavily modified.
Common BMW Crank Hub Issues Solved
The OE crank hub's friction material is notorious for slipping under high loads, which can alter timing and cause piston-to-valve contact—potentially leading to catastrophic engine failure. The MMX One-Piece Crank Hub prevents this by eliminating the friction plates, providing a bulletproof solution to protect your engine.
Peace of Mind for All Power Levels
Whether you're running a stock BMW or a tuned performance build, the MMX crank hub offers unmatched security. For S55 and N55 engines with Stage 1 tunes, the standard unpinned version is more than sufficient. For those pushing higher power and torque, the 4-pin dowel version (part number MMR20-1004) provides the ultimate crankshaft security, preventing any movement, even under extreme conditions.
Engineered for Strength and Durability
Crafted from billet EN36 steel and heat-treated with 0.75mm case hardening, the MMX crank hub is incredibly durable. Its one-piece construction ensures that slippage is no longer a concern. The kit also includes a new crank bolt for a complete upgrade that guarantees reliability far beyond the OE setup.
Optional Capture Plate for Ultimate Security
For added peace of mind, consider adding the optional MMX Capture Plate (part number MMR20-1002), designed to prevent the crank bolt from loosening due to engine vibrations. This billet aluminum plate securely bolts over the crank bolt head, making it impossible for the bolt to come undone, providing a comprehensive solution for any high-performance BMW.
Key Features:
- One-piece design eliminates slippage of friction plates.
- Billet EN36 steel construction with 0.75mm case hardening for maximum strength.
- Available with the optional MMX Capture Plate for additional security.
- Complete kit with all components needed for installation.
- 4-pin dowel version available for high-power S55/N55 builds.
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