2.0/2.3 9lbs-10lbs. Light Steel Flywheel. Race Only. Not for street use. Double drilled for the 7.5" & 8.5" clutch cover plate wide patterns only. Uses 3/8" bolts for the attachment of the pressure plate. RWA1625B-3/8. Use the 1625A flywheel bolts to attach the flywheel to the crankshaft.