Mahle OE HV385 top ring set, 4.085" diameter by 1.5mm (.151") with RW moly specification. The description lists a plasma-moly steel top ring in the HV385 profile sized to the exact 4.085 x 1.5mm dimensions for direct-fit replacement. It’s suitable for rebuilds requiring that HV385 profile and accurate ring sizing for sealing performance.
Mahle Rings Performance Plasma Moly Steel HV385 Top Ring 4.085in x 1.5MM .151in RW Moly Ring Set