Category Snowmobile/Ski DooSki Doo - Snowmobile Piston Kits Back Piston Ring R09-766 Snowmobile Parts & Accessories Type: STD 01 (0.25) 02 (0.50) 03 (0.75) 04 (1.00) Viewer:562 Item No: R09-766 Fits: 1974-1977 TNT 440 F/A 1974-1977 Blizzard 438 F/A You May Also Be Interested In Piston Ring R09-784 Piston Ring R09-760 Seal 12-19183 Piston Ring R09-604 Watch Our Product Videos