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.Heavy Duty for W2163225.Includes: PPA, (2) W3154122 (Discs) & Intermediate Plate.The W2163226 13" Dual Disc Clutch Unit - Reman fits equipment brands such as: Allis Chalmers, Deutz, White