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.If planning to send in for Rebuild & Return, the hub must be good.The M3703705 9" Single Stage Pressure Plate, w/ 1-3/8" 19 Spline Hub - Reman fits equipment brands such as: AGCO, Massey Ferguson, WhiteThe M3703705 is a substitute for the following discontinued products: M3704648