Fits:321574R91 International Tractor M, MD, Super M, Super MD, Super MDV, Super MDV-TA, Super MTA, Super MV, Super MVTA, T6, TD6, Super W6, Wuper W6TA, WD6, 400, W400, W450, 450. Fits our restoration quality high temp painted JJIH1923 muffler and also our show quality stainless steel JJIH1926 muffler.