The Briggs & Stratton 792649 is a genuine OEM piston ring set specifically designed for engines with a .020″ oversize bore. Unlike standard rings, these are used during engine rebuilds where the cylinder has been bored out to a larger diameter to remove wear or damage. Genuine OEM Ring Set The Briggs & Stratton Ring Set 792649 is the factory-original replacement. Using genuine rings is critical for maintaining proper compression and oil control, as they are manufactured to the exact metallurgy and tension standards required for Briggs & Stratton cylinder walls.