T701-6 muffler is the impedance compound muffler, resistive muffler by skeletons, Superfine glass wool for the muffling of sound-absorbing materials to achieve; resistance by mutation of the tube section of the muffler (not continuous) expansion chamber between the tubes and the effect is to be achieved. Rectangular muffler shell. Muffler in this series there are 10 specifications, section 1~4, each of which length is 1600mm