Supertech 77.5mm Bore Piston Rings - 1x3.1 / 1.2x3.40 / 2.8x3.10mm High Performance Gas Nitrided

These Supertech piston rings feature a gas nitrided finish, a process that hardens the surface to resist wear and improve durability, especially under high heat and stress. The specific ring groove dimensions are 1x3.1mm for the top ring, 1.2x3.40mm for the second ring, and 2.8x3.10mm for the oil ring, designed to precisely seal a 77.5mm bore.

When you're rebuilding an engine, especially one that will see spirited use, the piston rings are critical for proper compression and oil control. The nitriding process on these rings helps them maintain their seal and resist scuffing against the cylinder wall, which is crucial for engine longevity and performance. They are a well-built option for anyone looking to ensure their engine internals are up to the task.

Keep in mind that these rings are not CARB approved and cannot be shipped to California. Always refer to your engine's specific service manual for installation procedures and torque specifications.