E30 325i -11/’86 Lightweight Aluminum Flywheel

3 Series
E30 (84-91) > 325i
E30 (84-91) > 325ix

The JB Racing Aluminum Lightweight Flywheel significantly decreases the rotational mass compared to the original flywheel found on your -11/86 E30 325i. This reduction in mass allows the engine to accelerate more swiftly, making shifting quicker and rev-matching effortless.

Engineered specifically for street performance, JB Racing’s lightweight aluminum flywheels enhance vehicle responsiveness. By lowering both static weight and Moment of Inertia (MOI), these flywheels reduce the energy required for acceleration, effectively delivering more engine power directly to the wheels.

Each JB Racing flywheel is precisely manufactured from high-quality billet aluminum and features a “single-mass” design. All critical dimensions match those of the original flywheel, ensuring compatibility with OEM clutch components. The manufacturing process occurs entirely at JB Racing’s state-of-the-art facility, where each flywheel undergoes meticulous CNC machining, precise balancing, detailed inspection, and careful packaging.

Recognized as one of the country’s premier machine shops, JB Racing provides precision machining services to many professional racing teams. The flywheels produced for BMW vehicles adhere to the same rigorous standards trusted by these elite competitors, setting them apart from conventional market alternatives.

Standard features include:

• CNC-machined construction, precisely balanced to eliminate vibration.
• Replaceable hardened steel clutch surface, securely bolted (not riveted) for easy servicing.
• Heli-coil inserts in the pressure plate mounting holes, preventing thread damage during clutch replacements.
• Factory-spec starter ring gear.
• Hardened steel gaul plate protects against bolt-induced damage.
• Included hardware: flywheel bolts, pressure plate bolts, and dowel pins.
• Captive design with robust 10mm dowel pins.
• Fully metric hardware for pressure plate attachment.
• Weight reduced to 8 pounds, compared to the 16-pound OEM flywheel.
• Proudly manufactured in the USA.