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.Due to core supply, some Discs may be 6 pads. Included w/ MD6503358U & MD6503645U Clutch Units.The MD16405 11" Transmission Disc, 4 Pad, w/ 1-1/8" 15 Spline Hub - Reman fits equipment brands such as: Mahindra