Supertech 81mm Bore Piston Rings - 1x3.10 / 1.2x3.40 / 2.8x3.10mm High Performance Gas Nitrided

These are Supertech high-performance piston rings designed for an 81mm bore. They feature a specific ring groove sizing of 1x3.10mm for the top ring, 1.2x3.40mm for the second ring, and 2.8x3.10mm for the oil ring. The gas nitriding process hardens the surface of the rings, making them more resistant to wear and heat, which is crucial for engines running on gasoline.

The nitriding treatment helps these rings maintain their sealing ability under high temperatures and pressures, contributing to better engine performance and longevity. This set is a solid option when you're rebuilding or refreshing an engine and need reliable piston rings that can handle the demands of gasoline combustion.