Clutch Masters CM-053-FFL Flywheel Friction Lock with Diamond Particle Technology

The Clutch Masters CM-053-FFL Flywheel Friction Lock is an engineered protective shim designed to prevent flywheels from loosening and damaging the crankshaft in high-performance applications. Developed in partnership with global engineering leader 3M, this Flywheel Friction Lock (FFL) uses a nickel-coated steel substrate with partially embedded diamond particles. When installed between the flywheel and crankshaft, those diamond particles bite into both mating surfaces, dramatically increasing the friction and shear resistance of the joint. The result is a flywheel connection that can reliably handle up to 5× higher shear forces and transmit up to 5× higher torque compared to conventional assemblies — with no other modifications required.

Key Features:

• Nickel-coated steel substrate with partially embedded diamond particles for maximum grip
• Installed thickness of only .006"–.009" — does not significantly alter assembly spacing
• Proven to handle up to 5× higher shear forces and transmit up to 5× more torque than conventional systems
• Provides a hard protective layer between flywheel and crankshaft, helping prevent costly crankshaft damage if the flywheel shifts
• Easy to install and reusable after disassembly
• Developed with 3M friction shim technology specifically engineered for flywheel applications

For high-powered vehicles, a loose flywheel can weld itself to the crankshaft through fretting, resulting in catastrophic and expensive damage. The Clutch Masters Flywheel Friction Lock offers a simple, cost-effective solution that adds a meaningful layer of protection at the flywheel-to-crank interface. Fits select 1992–2016 Porsche, Volkswagen, and Audi models.