BMW E21 JB Racing Lightweight Flywheels 

has manufactured and supplied high quality lightweight aluminum flywheels to the performance industry for over 25 years. JB is the original designer and manufacturer of the BMW E36 aluminum flywheel. JB Racing is constantly expanding their flywheel line to include the latest performance applications such as; Mini Cooper and BMW E46 325/330, and Z4 utilizing the new 6-speed (SMG) transmission.  ALL of the current dual-mass replacement flywheels are designed to accommodate most of the common sprung-hub clutch discs to minimize the gearbox “rattle.” Sachs, S.P.E.C., Clutch Net, and others manufacture sprung-hub discs that will clear in the center hub cavity of these flywheels.

All of their flywheels are designed, manufactured, and assembled in-house at their  Florida facility which allows to maintain stringent quality control. You simply cannot buy a higher quality lightweight aluminum BMW flywheel… at any price!