CP-Carrillo CPN-3150 CPN Piston Ring Set 80mm Bore 1.0mm 1.2mm 2.8mm

The CP-Carrillo CPN-3150 is a high-performance CPN piston ring set designed for 80mm (3.150") bore applications. Engineered specifically for small-bore and sport compact engines operating under high cylinder pressures, this ring set delivers maximum sealing power with minimum friction and drag.

Key Features:

• 1.0mm Gas Nitrided Steel Top Ring — hardened compression ring compatible with both cast iron and Nikasil-coated cylinder bores for superior wear resistance
• 1.2mm Taper Hook Groove (THG) Napier-Style Second Ring — hooked underhook groove face improves oil scraping and allows the use of a lower-tension oil ring
• 2.8mm Low-Tension Flex Vent Oil Ring — mini flex vent design provides optimal oil control while reducing parasitic drag on the cylinder wall
• Compatible with advanced cylinder bore materials including Nikasil coatings
• High-strength, low-tension design balances sealing efficiency with reduced friction for improved engine output
• Sold as one set per cylinder — multi-cylinder engines require multiple quantities

CP-Carrillo recommends plateau honing the cylinder bore to a cross-hatch angle of 35–40 degrees prior to installation. A spec sheet with ring end gap guidelines is included with the ring set. For best results, consult with a qualified engine builder to determine the correct end gap for your specific application and power level.