Mopar Factory Exhaust Dimensions

Engine Years Before Muffler After Muffler Overall 340 1969-73 2.25 in. 1.88 in. 2.25 in. 383 1966 2.25 in. 1.88 in. 2.25 in. 383 1967-71 2.25 in. 2.00 in. 2.25 in. 383 Magnum 1968-71 2.50 in. 2.25 in. 2.25 in. 426 Hemi 1966-71 2.50 in. 2.25 in. 2.25 in. 440 1966 2.25 in. 2.00 in.  2.25 in. 440 1967-74 2.50 in. 2.25 in. 2.25 in. 440 1970 Chrysler 300 2.25 in. 2.00 in. 2.25 in.