The McCormick 3541622M91 Piston Ring Set is a genuine replacement component designed for engines with a 91.44mm bore. This set includes three rings with thicknesses of 2.38mm (top), 2.38mm (second), and 4.76mm (oil ring). It ensures optimal engine compression and oil control, crucial for maintaining performance and efficiency. This part is also cross-referenced as an OEM equivalent for Massey Ferguson, Landini, and Perkins applications.