Category Snowmobile/Other Back Piston Kit 09-661 STD Snowmobile Parts & Accessories Type: STD 01 (0.25) 02 (0.50) 03 (0.75) 04 (1.00) Viewer:250 Item No: 09-661 STD Fits: Cuyuna 1974-1978 You May Also Be Interested In Piston Kit 09-8039 STD (Right Side) Piston Kit 09-661 STD Oil Seal Kit HS-55154 Connecting Rod Kit 3R2-11650-01-00