The Landini 41158017 Piston Ring Set is a genuine replacement component specifically designed for Perkins A6.354.4 engines. This comprehensive kit includes piston rings engineered with a precise bore diameter of 98.43 mm, featuring individual ring thicknesses of 3.175 mm, 2.38 mm, and 4.76 mm. It is crucial for maintaining optimal engine compression, reducing oil consumption, and ensuring efficient performance in compatible Landini agricultural tractors.