1-5/8" kits include front pulley, belt, clutch hub, clutch basket and aramid clutch set (consists of two half plates, four full plates and five steel drive plates) Direct bolt-in applications All systems come with the Quiet Clutch and ball-bearing lockup design pressure plate Lockup design applies extra pressure to the clutch plates for positive engagement with no clutch slippage No increase in lever pull effort Rear pulley has a 40mm, double-row bearing with an inner stress-proof steel clutch hub to support the clutch Replacement components available separately Made in the U.S.A. Not for use with offset primaries. BELT DRIVE 1-5/8"90-06ST