Supertech 90mm Bore Piston Rings - 1x3.30 / 1.2x3.70 / 2.8x3.30mm High Performance Gas Nitrided

These Supertech piston rings feature a specific ring groove sizing: 1mm for the top ring, 1.2mm for the second ring, and 2.8mm for the oil ring. The gas nitriding process hardens the surface of these rings, making them more resistant to wear and heat, which is crucial for high-performance gas applications. This treatment helps ensure a good seal between the piston and cylinder wall, contributing to efficient combustion and engine longevity.

The precise dimensions and the nitriding process work together to maintain a consistent seal under demanding conditions. This helps prevent blow-by, which is when combustion gases escape past the piston rings into the crankcase, and also helps keep oil from entering the combustion chamber. Proper sealing is fundamental for engine power and oil control.