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This CP piston ring set is specified with a 1.0mm top ring, 1.2mm second ring (THG Napier), and a 2.8mm flex vent oil ring for a 3.248in bore. Supplied as a matched ring set, it provides the listed ring thicknesses and oil control configuration for engine builders or rebuilds that require these exact ring sizes and the 3.248‑inch cylinder bore specification.
CP Ring Set 1.0mm Top Ring - THG Napier 1.2mm 2nd Ring - 2.8mm Flex Vent Oil Ring - 3.248 Bore
