The Stanley Muffler Company 2-1/2 in. x 29 in. Inlet Aluminized Tractor Muffler for Farmall H, Super H, M, Super M, MD and More fits Farmall H, Super H, M, Super M, MD, Super MD and Super MTA units. The Stanley muffler is also compatible with International W-4, S-W4, W6, S-W6, WD6 and S-WD6 (gas and diesel engines), Farmall 300 and 350 (C-175 gas engine), Farmall 400 and 450 (C-281 gas and D-281 diesel engine), Farmall 460 and International 606 (C-221 gas and D-236 diesel engine) and Farmall 560 (C-263 gas and D-282 diesel engine) units.