Category Snowmobile/Other Back Piston Ring R09-661 Snowmobile Parts & Accessories Type: STD 01 (0.25) 02 (0.50) 03 (0.75) 04 (1.00) Viewer:156 Item No: R09-661 Fits on Piston Kit 09-661 Fits: 1974-1978 Cuyuna You May Also Be Interested In Piston Kit 09-667 STD Piston Kit 09-662 STD Oil Seal Kit 6K8-W0001-OS Gasket, Manifold 60T-13556-00-00