Muffler, horizontal round body. 2-1/2 inch inlet ID, 2-1/2 inch outlet OD, 25-1/2 inch overall length, 4-1/4 inch shell diameter, 19-3/4 inch shell length, 3 inch inlet length, 2-3/4 inch outlet length. Tractors: 55 Gas (HC217 engine, s/n 57001 to 59281); 55 Gas (HE217 engine, s/n 59282 & up). Replaces AH11054.