CP Ring 85.6mm Bore Gas Nitrided Steel 1.0mm Top Ring THG 1.2mm 2nd Ring 2.8mm Flex Vent Oil Ring

CP Pistons is a well-known name in the performance engine world, and their piston rings are built to match that reputation. This set, part number CPN-3372, is designed for an 85.6mm bore and features a gas nitrided steel top ring for improved wear resistance. The second ring is 1.2mm thick, and the oil ring is a 2.8mm flex vent design, all working together to seal the combustion chamber effectively.

The gas nitriding process hardens the surface of the steel top ring, making it more resistant to abrasion and extending its service life, especially in demanding applications. This attention to material and finish helps ensure a solid seal between the piston and cylinder wall, which is crucial for maintaining compression and preventing blow-by. The flex vent oil ring design is intended to maintain consistent tension across the cylinder wall, helping to control oil consumption.