Product Overview
4Piston Racing presents the Diamond Claw Crank Lock designed specifically for the Honda Civic Type R FK2 and FK8 models equipped with the K20C1 engine. This crank lock is engineered to prevent flywheel bolts from loosening in high-revving conditions, protecting the crankshaft from damage caused by vibrations and harmonics.
Product Overview
The Diamond Claw Crank Lock is a surface lock that eliminates the risk of flywheel bolts backing out by preventing fretting and surface welding between the flywheel and crankshaft. It features a precisely engineered surface embedded with CBN (diamond) particles, which penetrate hardened surfaces to maintain a secure connection without affecting driveline alignment.
Performance & Application
Constructed from fatigue-resistant steel with diamond particles rated at 10,000 Vickers hardness, the Diamond Claw provides exceptional toughness and durability. Its installed thickness of just 0.008 inches ensures no impact on driveline alignment. This lock is ideal for high rpm applications where vibrations can cause flywheel movement, offering an additional layer of protection to the crankshaft during aggressive driving or track use.
Vehicle Compatibility
This crank lock is confirmed compatible with the Honda Civic Type R FK2 and FK8 models fitted with the K20C1 engine.
For precise fitment, please use our vehicle finder or contact Performance Car Parts UK for expert advice.













