Supertech 89mm Bore Piston Rings - 1x3.30 / 1.2x3.70 / 2.8x3.30mm High Performance Gas Nitrided

This set includes piston rings designed for an 89mm bore, with specific dimensions of 1x3.30mm for the top ring, 1.2x3.70mm for the second ring, and 2.8x3.30mm for the oil ring. These rings are gas nitrided, a surface hardening process that makes them more resistant to wear and heat, which is important for high-performance gas engines.

The nitriding process creates a very hard layer on the surface of the rings, helping them to maintain their shape and sealing ability under demanding conditions. This updated design aims for improved durability and consistent performance in your engine rebuild. Proper installation is key to ensuring these rings seal effectively against the cylinder walls.