This Lightweight Aluminum Flywheel is designed as a direct replacement for your OEM flywheel. A core charge of $100 may apply to some models.
The benefits are:

• Our BMW High Performance Flywheels weigh only between 8-10 lbs depending on application!!! Stock flywheel weights range from approximately 17-27lbs. ZOOM ZOOM ZOOM
• Reduces rotating mass and moment of inertia to allow for quicker acceleration and decelaration
• Adds exhilaration to your driving
• Features a replaceable heavy duty friction surface and OEM ring gear
• Supplied ready to bolt in, with hardware, and accepts original clutch disc.