One new aftermarket upper cylinder head replacement kit. Fits Massey Ferguson Combine Harvester models: 31, 565. Fits Massey Ferguson Forklift models: 6500. Fits Massey Ferguson Industrial/Construction models: 20, 30D, 50B, 50C, 50D, 50E, 50EX. Fits Massey Ferguson Loader models: 50, 50H, 50HX, 60, 60H. Fits Massey Ferguson Skid Steer Loader Models: 575. Fits Massey Ferguson Tractor Models: 168, 1744S, 175, 178, 180, 184, 1844, 185, 188, 255, 265, 274, 274-4, 275, 283, 290, 294, 3050, 3060, 362, 365, 374F, 374S, 374V, 375, 382N, 383, 384GE, 384S, 384V, 390, 393, 393S, 394F, 394FQ, 394GE, 394H, 394S, 394SQ, 670, 675, 690Fits Massey Ferguson Engine Models: A4.236 Diesel (Late Block), A4.248 (Liner L / Flame Ring)Fits Allis-Chalmers Industrial/Construction Models: 715B (E-SN U106655N>)Fits Allis-Chalmers Powertrain Models: D175Fits Allis-Chalmers Wheel Loader Models: 840Technical Information:For Diesel EnginesCylinder: Four Cylinder. Replaces parts: 3637362M91, 3637363M91, 3637444M91, 3638297M91, 3638366M91, 3638663M91, 3638983M91, 3640783M91, 4223006M91, 4224189M91, 4224320M91, 4224573M91, U5LT0052, U5LT0057, U5LT0059, U5LT0063, U5LT0064, U5LT0065, U5LT0066, U5LT0067, U5LT0076, U5LT0565, U5LT1002, U5LT1004