E36 323i/325i, E34 525i Aluminum Lightweight Flywheel

3 Series
E36 (92-99) > 323ic
E36 (92-99) > 323is
E36 (92-99) > 325i
E36 (92-99) > 325ic
E36 (92-99) > 325is
5 Series
E34 (89-95) > 525i M50

The JB Racing Aluminum Lightweight Flywheel significantly reduces the high rotating mass of your stock E36 325 or 323 flywheel, enabling your engine to rev more quickly. This results in faster shifting and effortless rev-matching, enhancing overall driving performance.

Designed to deliver performance improvements for street-driven vehicles, JB Racing’s lightweight aluminum flywheels reduce static weight and Moment of Inertia (MOI). This allows the engine to rev faster and requires less power to accelerate the flywheel, ensuring more power is transferred to the wheels.

These lightweight aluminum flywheels are crafted from billet aluminum and feature a “single-mass” design. Critical dimensions of the OEM flywheel are precisely replicated, and the flywheel is engineered to accommodate OE clutch components.* Every JB Racing flywheel is manufactured using advanced CNC equipment and undergoes a rigorous process of design, machining, assembly, balancing, inspection, and packaging at our facility.

As one of the most respected machine shops in the country, 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 level of precision and quality relied upon by these winning teams, setting them apart from standard 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 24.5-pound flywheel

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