One new aftermarket replacement muffler fits Massey Ferguson Industrial Construction Models: 70, 80, Tractor Models: 1080, 1100. Technical Information: Vertical/Oval Body – Shell Size 5″ x 11″. Round Muffler 513563M92 is also available for these applications Size A (1) A: 10.00″ INLET LENGTH Size B (2) B: 2 3/4″ INLET ID DIAMETER Size C (3) C: 16.00″ SHELL LENGTH Size D (4) D: 6 1/2″ OUTLET LENGTH Size E (5) E: 2 3/4″ OUTLET OD DIAMETER Size F (6) F: 32.00″ OVERALL LENGTH Replaces Part Number(s): 530690M91 Models This Part Fits: 1080, 1100 Reference Numbers: 522422M92, 530690M91