Check out any of the fifteen Muffler components enlisted.
With all the components that make up the GS400 1979 (N) (E01 E02 E04 E17 E18 E21 E22 E24 E25 E30 E34 E39) MUFFLER assembly. The Plate,exhaust P is the most frequently specified with four applications.
Parts such as the Muffler: Plate,exhaust P, Lock Washer, Body,muffler, Bolt 10x25 are included in the Gs400 1979 (n) (e01 E02 E04 E17 E18 E21 E22 E24 E25 E30 E34 E39) Muffler parts fiche.