520-180-240

BMW Fitments:

3 Series
E46 (99-05) > M3
Z Series
E85 / E86 Z4 (03-08) > Z4 M

JB Racing Aluminum Lightweight Flywheel – E46 M3

Ditch the heavy stock flywheel and unlock quicker revs with JB Racing’s Aluminum Lightweight Flywheel for the E46 M3. By cutting down the high rotational mass, this upgrade helps your engine spin up faster, making gear changes snappier and rev-matching smooth and effortless.

Engineered for performance-driven street use, this lightweight flywheel reduces both static weight and Moment of Inertia (MOI), allowing your engine to work more efficiently. Less energy is required to rotate the flywheel, meaning more power makes it to the wheels.

Each flywheel is CNC-machined from high-grade billet aluminum and designed as a single-mass unit. It matches OEM specs precisely and is fully compatible with factory clutch components.* Every step of the manufacturing process—from design to final inspection—is done in-house at JB Racing’s world-class U.S. facility, trusted by top professional race teams.

Notable Features:

• Precisely CNC-machined and zero-balanced to prevent vibration

• Replaceable hardened steel clutch face, bolted on (not riveted)

• Heli-coil inserts ensure durable threads for repeated clutch replacements

• OEM-style starter ring gear

• Hardened steel gall plate prevents flywheel bolt damage

• Includes flywheel bolts, pressure plate bolts, and 10mm captive dowel pins

• All pressure plate hardware is metric

• Weighs just 10 lbs—less than half the 24.2 lb OEM unit

• Made in the USA