TM 10-3930-669-20 (3) Remove two nuts (9) and clamp (10), and slide muffler (4) from elbow (11). (4) Remove  two  nuts  (12),  clamp  (13),  and  shim (14) from bracket (8) and elbow (11). (5) Remove  three  screws  (15),  washers  (16),  nuts (17),  elbow  (11),  and  gasket  (18)  from  exhaust manifold (19).  Discard gasket. 5-3