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.Includes: PPA, F400160 (Flywheel Side Transmission Disc) & F400441 (Captive PTO Disc)The F40270U 9-1/2" Dual Stage Clutch Unit - Reman fits equipment brands such as: Ford, Shibaura