Supertech 90.50mm Bore Piston Rings - 1x3.30 / 1.2x3.70 / 2.8x3.30mm High Performance Gas Nitrided

These are Supertech high-performance piston rings designed for a 90.50mm bore. They feature a specific ring groove sizing: 1x3.30mm for the top ring, 1.2x3.70mm for the second ring, and 2.8x3.30mm for the oil ring. The gas nitriding process hardens the surface of the rings, making them more durable and resistant to wear, which is crucial for maintaining good compression and sealing in a performance engine.

The nitriding treatment helps these rings stand up to the increased heat and stress found in performance applications. This process creates a tough, wear-resistant layer on the ring surface, ensuring they maintain their seal against the cylinder wall over time. Proper ring seal is essential for engine power, efficiency, and longevity, especially when you're pushing the engine harder than stock.

When rebuilding an engine, especially one that will see higher performance demands, using well-made piston rings like these is important. They are designed to work with the specific dimensions of your cylinder bore to ensure a tight seal, which helps prevent blow-by and oil consumption. Always refer to your engine's specific service manual for installation procedures and torque specifications.