The McCormick 3383568M1 Piston Ring Set is a genuine OEM component designed for optimal engine performance in various agricultural machinery. This ring set features a bore diameter of 91.44mm, ensuring a precise fit and reliable sealing for the piston. It is compatible with a wide range of Massey Ferguson, Landini, and McCormick tractors, as well as Perkins engines. This essential engine part helps maintain proper compression and oil control, contributing to engine efficiency and longevity.