Supertech 99.75mm Bore Piston Rings - 1x3.70 / 1.2x4.10 / 2.8x3.10mm High Performance Gas Nitrided

When you're rebuilding an engine and need to ensure a proper seal between the piston and cylinder wall, a good set of piston rings is critical. These high-performance gas nitrided rings from Supertech are designed for a 99.75mm bore, making them a solid option for many engine builds where precision is key. The nitriding process hardens the surface of the rings, which helps them resist wear and maintain their sealing ability over time, especially under demanding conditions.

This set features a specific ring configuration: a 1x3.70mm top ring, a 1.2x4.10mm second ring, and a 2.8x3.10mm oil ring. This combination is chosen to work effectively within the cylinder to manage compression and control oil. The gas nitriding treatment is a notable detail, as it significantly improves the durability and performance of the rings compared to standard cast iron or chrome-plated rings. This means they can handle the heat and stress of regular operation, contributing to the overall longevity and efficiency of your engine.