The component with the lowest price in the MUFFLER (4) schematic is the Screw-washer,5x12.
The Gx270\vpe4\14zh90e9 Muffler (4) consists of twenty-three pieces with the Muffler Comp (sdm being the most expensive.
The twenty-three Gx270\vpe4\14zh90e9 Muffler (4) component parts are all listed in this schematic.