Ball-bearing lockup clutch provides approximately 60% more surface contact area than the stock clutch for smooth, sure power transfer Kit includes motor plate, starter standoff, ring gear guard, pinion gear kit, 52T front pulley, rear pulley with 69-tooth 2" clutch basket, ring gear, lockup clutch and aramid 132T drive belt Made in the U.S.A.. BELT DRIVE 2" 90-06ST BLK