E46, E39, Z3, Z4, M52TU, M54 Aluminum Lightweight Flywheel

BMW Fitments

The JB Racing Aluminum Lightweight Flywheel dramatically decreases the high rotating mass of your stock E36 M3 flywheel, enabling your engine to rev more rapidly. This results in quicker shifts and effortless rev-matching.

Engineered for performance upgrades in street-driven vehicles, JB Racing’s lightweight aluminum flywheels reduce static weight and Moment of Inertia (MOI), allowing the engine to rev faster. With less power required to accelerate the lightweight flywheel, more power is delivered to the wheels.

Crafted from billet aluminum and designed as “single-mass” units, these flywheels are precision-engineered for optimal performance. The newly designed E36 M3 flywheels are compatible with sprung-hub M5 clutch discs—explore our clutch/flywheel packages or contact us for details. Every JB Racing flywheel is produced using state-of-the-art CNC machinery and undergoes meticulous design, machining, assembly, balancing, inspection, and packaging processes at our facility.

Renowned as one of the nation’s top machine shops, JB Racing is trusted by numerous professional race teams for precision machining of engines and driveline components. Our BMW flywheels are built with the same exacting standards and quality relied upon by these winning teams, setting them apart from typical market offerings. Key features include:

– CNC-machined flywheel, zero-balanced to eliminate vibration
– Replaceable hardened steel clutch surface, securely bolted (not riveted)
– Heli-coil inserts for pressure plate to prevent stripping during clutch replacement
– Factory starter ring gear included
– Hardened steel gaul plate protects flywheel from bolt damage
– Includes flywheel bolts, pressure plate bolts, and dowel pins
– Captive design 10mm dowel pins for secure installation
– All metric pressure plate hardware provided
– Weighs just 10 pounds compared to the stock 25-pound flywheel
– Proudly made in the USA

NOTE: We recommend always using a sprung-hub clutch disc with your JB Racing lightweight flywheel for reduced noise and drivetrain stress.