Description
The MMX Performance Crank Hub Capture Plate is a simple but critical upgrade for any high-performance or track-driven BMW S55 or N55 engine. Designed to eliminate the risk of crank bolt loosening, this billet aluminum component helps protect your engine from the well-documented timing slip issues that plague these platforms.
The factory crank hub on the S55 and N55 is a known weak point—using a three-piece design that can allow the crank bolt to back out due to engine harmonics and vibration. Even a slight loss of torque on the crank bolt can cause your timing to shift, with potentially catastrophic results.
The MMX capture plate addresses this directly by physically locking the crank bolt in place, preventing it from turning under any circumstances. Precision-machined from T6-6061 billet aluminum, then anodized in MMX’s gloss black signature finish, this plate surrounds the OE crank bolt head completely and mounts securely using elongated slots for a perfect fit—whether you're running the factory crank hub or the upgraded MMX one-piece design.
Installation can be performed without engine removal. With the radiator dropped for access, the plate can be installed with the engine in the car, making this a high-impact, low-downtime upgrade.
Key Features:
- Prevents timing slip by locking the crank bolt in place
- Works with both OE crank hub and MMX one-piece crank hub
- CNC-machined from high-strength T6-6061 billet aluminum
- Finished in gloss black anodizing for durability and a clean appearance
- Elongated mounting slots ensure secure, accurate fitment
- Installs with engine in situ – only radiator needs to be dropped
- Essential upgrade for tuned, tracked, or hard-driven S55/N55 vehicles
Applications:
- BMW F87 M2 Competition (S55)
- BMW F80 M3 / F82 M4 (S55)
- BMW F22 M235i / M240i (N55)
- BMW F30 335i / 340i, F32 435i / 440i (N55)
- BMW F10 535i (N55) and other F-Series with N55 engines
Note: Crank hub not included. Shown for illustration only. Plate is now anodized in gloss black.
