The Case-IH 91317C91 is a genuine OEM piston ring set designed for specific Case-IH agricultural and industrial equipment. This ring set provides essential sealing for the piston within the cylinder, crucial for maintaining proper engine compression and oil control. Manufactured to original equipment specifications, it ensures durability and reliable performance, contributing to the longevity and efficiency of your machinery's engine. Always refer to your equipment's parts manual for exact fitment.