Sierra 18-2771 Bellows Kit The Sierra 18-2771 Bellows Kit is interchangeable with the following: GLM 21962, Mallory 9-72930, OMC 3858631, 3854270. Contains: (1) 18-2613 Outdrive Gasket, (1) 18-2763 Shift Cable Bellows, (1) 18-2764 Exhaust Bellows, (1) 18-2765 U-Joint Bellows, (1) 18-7315 Hose Clamp, (1) 18-2100 Gimbal Bearing. Sierra Exhaust Bellows Kit Contains: (1) 18-2613 Outdrive Gasket, (1) 18-2763 Shift Cable Bellows, (1) 18-2764 Exhaust Bellows, (1) 18-2765 U-Joint Bellows, (1) 18-7315 Hose Clamp, (1) 18-2100 Gimbal Bearing Sierra part number: 18-2771 Interchangeable with the following: GLM 21962, Mallory 9-72930, OMC 3858631, 3854270