, Dim C (3): C: 13 1/2" SHELL LENGTH, Dim D (4): D: 2" OUTLET LENGTH, Dim E (5): E: 1 7/8" OUTLET O.D., Dim F (6): F: 17 1/2" OVERALL LENGTH, Notes: Horizontal / Round Body - 3 1/2" Shell Diameter.Muffler, Dim A (1): A: 2" INLET LENGTH, Dim B (2): B: 2" INLET I.