Supertech 78.5mm Bore Piston Rings - 1x3.1 / 1.2x3.40 / 2.8x3.10mm High Performance Gas Nitrided

These are Supertech high-performance piston rings designed for a 78.5mm bore. They feature a gas nitrided finish, which is a surface hardening process that makes the rings more durable and resistant to wear. This set includes rings with specific dimensions: 1x3.1mm for the top ring, 1.2x3.40mm for the second ring, and 2.8x3.10mm for the oil ring.

The nitriding process creates a very hard surface layer on the rings, helping them to withstand the high temperatures and pressures found in performance engines. This improved durability means they can maintain a good seal against the cylinder wall for longer, which is crucial for consistent compression and efficient combustion. The specific ring sizes are chosen to work with a variety of piston designs commonly used in performance builds.

When rebuilding an engine, especially one that will see higher performance demands, using well-made piston rings like these is important for ensuring proper engine function and longevity. Always refer to your engine's specific service manual for installation procedures and torque specifications.