Some specs from the JB racing website for those who pmed me.
95 E36 M3 w/ S50 3.0L - 6 cyl.
1996 - 99 E36 M3 w/ S52 3.2L - 6 cyl.
Clutch Diameter: 240mm
OEM Flywheel Wt. 25.0 lbs.
Alum. Flywheel Wt. 10.0 lbs.
Lightweight Aluminum flywheel replaces stock dual-mass flywheel. Accepts OEM clutch/pressure plate/throw-out bearing components as well as performance aftermarket direct replacements. Will also accept many aftermarket sprung-hub clutch discs. Provides improved throttle response and increased performance. For a complete flywheel/ sprung-hub performance clutch kit - see PN 520-010S-S855