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:145 Item No: R09-661 Fits on Piston Kit 09-661 Fits: 1974-1978 Cuyuna You May Also Be Interested In Piston Ring R09-667 Piston Kit 09-662 STD Connecting Rod Kit CR163 Gear Set 43-853641A2