This core is extremely rare and your core is required to fulfill this order. Contact us for instructions on sending your core in for Rebuild & Return.Multiple clutch options, positively identify before ordering. Uses (1) 8301080 & (1) 830664 release bearings. Lever lengths vary for PTO & transmission.Includes: PPA, Captive Disc & MD6500480 (Flywheel Side Transmission Disc)The MD6504450U1 11" Dual Stage Clutch Unit - Reman fits equipment brands such as: MahindraThe MD6504450U1 is a substitute for the following discontinued products: MD6500485