Clutch Masters CM-140-FFL Flywheel Friction Lock BMW E36 E46 M3 Z3 M FW-140-AL

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Product Specification:

SKU:CLMCM-140-FFL

MPN: CM-140-FFL

UPC: CM-140-FFL

Weight: 0.06 lb

Inventory: 2

Type: Flywheels

Vehicle Fitment

1995 BMW M3 (E36) - S50B30 3.0L Inline-6, Manual
1995-1999 BMW M3 (E36) - S52B32 3.2L Inline-6, Manual
2001-2006 BMW M3 (E46) - S54B32 3.2L Inline-6, Manual
1998-2002 BMW Z3 M Roadster / Z3 M Coupe - S52B32 / S54B32 3.2L Inline-6, Manual

Fitment Notes

Designed for use with Clutch Masters FW-140-AL (aluminum) or FW-140-SF (steel) flywheel - not a standalone vehicle part; the FFL installs between the Clutch Masters flywheel and the crankshaft flange
Installed thickness: 0.006"-0.009" - does not significantly alter clutch assembly spacing or require additional shimming in normal fitment
Strongly recommended whenever installing a Clutch Masters FW-140-series flywheel, particularly in high-power or performance applications where flywheel fastener integrity is critical

Features

Nickel-coated steel substrate with partially embedded diamond particles - developed in partnership with 3M using their friction shim technology specifically engineered for flywheel applications
Diamond particles "bite" into both the flywheel and crankshaft flange surfaces, dramatically increasing friction and resistance to rotation between the mating surfaces
Prevents flywheel fretting and welding to the crankshaft if the flywheel fasteners come loose - eliminates one of the most catastrophic and costly failure modes in performance flywheel applications
Provides an extra layer of protection against crankshaft damage even if flywheel bolts back out under sustained high-load operation
Minimal installed thickness (0.006"-0.009") has no meaningful effect on assembly spacing or clutch engagement geometry
Easy installation - cut to shape or installed as a disc between mating surfaces at time of flywheel installation
Made in the USA by Clutch Masters since 1976

Specifications

Part Number: CM-140-FFL
Product Type: Flywheel Friction Lock (FFL)
Material: Nickel-Coated Steel Substrate with Partially Embedded Diamond Particles (3M Technology)
Installed Thickness: 0.006"-0.009"
Compatible Flywheels: Clutch Masters FW-140-AL, FW-140-SF
Application: BMW E36 M3 / E46 M3 / Z3 M - S50 / S52 / S54 Inline-6

Included Components

1x Clutch Masters CM-140-FFL Flywheel Friction Lock shim (sized for FW-140 flywheel family)

Product Description

The Clutch Masters CM-140-FFL is a Flywheel Friction Lock (FFL) - a precision-engineered protection shim designed to be installed between a Clutch Masters FW-140-series flywheel and the crankshaft flange on BMW E36 M3, E46 M3, and Z3 M applications. Developed in partnership with 3M using their friction shim technology, the FFL features a nickel-coated steel substrate with partially embedded diamond particles that physically grip both mating surfaces, dramatically increasing resistance to rotational movement between the flywheel and crank.

When a flywheel comes loose - whether from fastener fatigue, improper torque, or sustained high-load operation - it typically welds or frets itself to the crankshaft, causing damage that often renders the crankshaft unrepairable. The FFL's embedded diamond particles prevent this welding by maintaining friction even as clamping force from the flywheel bolts decreases, giving the driver time to detect the problem before catastrophic damage occurs. At only 0.006"-0.009" installed thickness, the FFL has no meaningful effect on clutch assembly spacing or geometry. It is a highly recommended addition to any FW-140-series flywheel installation, especially in high-performance or track-driven BMW builds.