The Mahle Performance plasma moly top ring HV385 is a 3.199-inch diameter, 1.0mm section moly steel top piston ring supplied to match the listed bore specification. Offered as a precision replacement ring, it features the plasma-moly treatment noted in the catalog title and is intended for use in compatible engine rebuilds requiring the specified dimensions and ring construction.
Mahle Rings Performance Plasma Moly Steel HV385 Top Ring 3.199in x 1.0MM .143in RW Moly Ring Set