Manufactured by Kit Includes 2 Compression Rings (you get exactly what is pictured) Rings are interchangeable with OEM pistons unless noted Rings are for standard bore size – 52.00mm Compatible with Polaris models below: 2001 Scrambler 90 2001 Sportsman 90 2002 Scrambler 90 2002 Scrambler 90X 2002 Sportsman 90 2003 Predator 90 2003 Scrambler 90 2003 Sportsman 90 2004 Predator 90 2004 Sportsman 90 2005 Predator 90 2005 Sportsman 90 2006 Predator 90 2006 Sportsman 90