This CP oil control ring is a 3.0mm, .150 radial wall low-tension flex vent oil ring sized for a 4.000" bore. Specified for engines requiring a low-tension vented oil ring profile, it serves as a direct replacement ring matching the 4.000" bore dimension and intended for rebuilds where the listed radial wall and tension characteristics are required.
CP 3.0mm .150 Radial Wall Low Tension Flex Vent Oil Ring 4.000 bore