Product Name: Piston Ring Set Material: Aluminum Number of Cylinders: 1 Cylinder Diameter: STD 83 mm Pin Length: 19 mm Total Height: 58. 8 mm Compression Height: 18. 9 mm Quantity: Selectable Piston OEM Code: 4GB-11631-00-Y0 Piston Ring OEM Code: 4GB-11610-40-00 Compatibility: ATV YFM400 Big Bear 4x4 2000-2006 ATV YFM400 Big Bear IRS 4x4 2007-2012 ATV YFM400F Kodiak 4x4 1993-1999 Material: Nodular Cast Iron Piston OEM Code: 4GB-11631-00-Y0 Pin Length: 19 mm Compression Height: 18. 9 mm Cylinder Diameter: STD 83 mm Total Height: 58. 8 mm The piston rings are designed for use in ATVs, providing efficient compression and reduced friction compared to standard rings. These piston rings are -engineered to fit 83 mm cylinders, ensuring a secure fit and improved engine performance. The exact compression height of 18. 9 mm and pin length of 19 mm contribute to engine efficiency, maximizing power and performance. Available in multiple quantity options. Compatibility Disclaimer: This is an aftermarket replacement part.Any brand names or model designations mentioned are used solely for the purpose of demonstrating compatibility.