The Mahle Plasma Moly steel top compression ring set is specified at 4.475 in diameter with a .0625 in thickness and .190 in RW dimension. Offered as a precision replacement ring set, these plasma moly top compression rings are listed with the exact dimensional specifications to match compatible piston and cylinder configurations.
Mahle Rings Plasma Moly Steel Top Compression Ring 4.475in x .0625in .190in RW Moly Ring Set