64D-11603 Piston Ring Set For Outboard Engine 64D-11603-01-90 200HP-250HP V6 90mm STD Replaces Aftermarket Piston ring set designed for outboard engines with model number 64D-11603-01-90.Compatible with 200HP to 250HP V6 engines featuring a 90mm standard bore size.This set replaces aftermarket piston rings and is engineered to maintain proper compression and oil control within the engine cylinder.Includes all necessary rings for complete piston assembly replacement.Constructed to meet specifications for fit and function. Compatibility Disclaimer: This is an aftermarket replacement part.Any brand names or model designations mentioned are used solely for the purpose of demonstrating compatibility.