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, F400373 (Captive Transmission Disc) & Flywheel Side PTO DiscThe F40483U 9" Dual Stage Clutch Unit - Reman fits equipment brands such as: Ford, ShibauraThe F40483U is a substitute for the following discontinued products: F400383