High-quality GoPart 68504GP piston and piston ring set, specifically designed for Perkins 3-cylinder AD3.152, A3.152, and AT3.152 diesel engines. This complete piston assembly features a 91.44 mm bore, a total height of 107.5 mm, and a 31.75 mm pin diameter. It includes three piston rings with thicknesses of 2.38 mm, 2.38 mm, and 4.76 mm. This component is essential for engine overhaul and maintaining optimal performance in various Massey Ferguson tractor models including the 35, 135, 230, 240, 250, 340, 342, 350, 352, 355, 550, and industrial models like 20C, 20D, 20F, 30B, 30E, 40B, 40E, 50B, 50C, 50EX, 50H, 50HX, 60H, 60HX. Replaces multiple OEM part numbers.