Carrillo CPN-2894 CPN Piston Ring Set 2.894 in. Bore

The Carrillo CPN-2894 is a high-performance piston ring set designed for sport compact and small-bore engines requiring superior sealing under intense cylinder pressures. Engineered by CP-Carrillo in Irvine, California, these rings are built to deliver maximum seal with minimum drag for naturally aspirated and forced induction applications.

Key Features:

• Bore Size: 2.894 in. (73.51 mm)
• 1.0mm Gas-Nitrided Steel Top Ring — provides robust compression sealing and is compatible with both cast iron and Nikasil cylinder bores
• 1.2mm Napier-Style Second Ring — taper underhook groove face improves oil scraping and allows use of a lower-tension oil ring
• 2.8mm Flex Vent Oil Ring — two gas-nitrided rails with a low-tension expander and mini-flex vent design for optimal oil control with minimal parasitic drag
• Compatible with Nikasil, cast iron, and other advanced cylinder bore coatings
• Sold as a complete set per piston

CP-Carrillo recommends plateau honing with a cylinder bore cross-hatch angle of 35–40 degrees when installing CPN ring sets for maximum ring seal and longevity. These rings are ideal for high-compression small-bore engines found in sport compact, motorcycle, marine, and powersports applications where cylinder pressure demands the highest level of sealing performance.