3in electric start kits include front pulley, belt, clutch hub and clutch basket and clutch set (consists of two half plates, four full plates and five steel drive plates), 6061 T-6 billet motor plate, outside guard and polished pulley cover. 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 USA. 3in systems are not designed for use with floorboards.. Not for use with offset primaries.