MMX Crank hub capture plate | BMW S55 | N55

Description

The MMR Performance Crank Hub Capture Plate is a precision-engineered reliability upgrade for BMW vehicles equipped with the S55 and N55 engines. These engines are known to suffer from crank hub bolt loosening, which can cause the factory three-piece crank hub friction plates to slip, potentially resulting in catastrophic timing issues and engine damage. The capture plate completely surrounds and secures the head of the OEM crank bolt, making it physically impossible for it to loosen or rotate under engine vibration or load. Machined from T-6061 billet aluminium and finished with an anodised coating, this capture plate can be fitted either with the standard crank hub or paired with an upgraded single-piece crank hub for maximum drivetrain security. Installation is achievable with the engine in place if the radiator is dropped for access, making it a sensible first upgrade for vehicles that see spirited driving, higher power levels or track use.

Features:

• Full surround capture of the OEM crank bolt head prevents loosening and slippage.

• Machined from durable T-6061 billet aluminium with anodised finish.

• Compatible with the stock crank hub or an upgraded one-piece crank hub.

• Simple installation with engine in situ (radiator drop required).

• Strong upgrade for tuned and high-power S55 / N55 applications.