In Patricks picture above, the bracket attached to the muffler is designed very similar to what I observed on a CSX3XXX car a few years ago. It has a lot of surface area attached to the muffler casing in vertical shear and with the 90 degree fold in the metal provides lateral stability also. However in lieu of the large rubber "Strap" on the ERA cars, the CSX had 2 "hangers" spaced about 3/4" apart, made of similar gauge sheet metal (like the bracket) welded from above. The blade on the muffler bracket had a hole about 5/8" and is sandwiched with one of the round 2 piece grommets I mentioned earlier, then the blade (with grommet) slides between the two hangers and a 5/16" bolt goes through all 3 pieces, providing a very stout design. The rubber grommet helps dampen the sound harmonics from the chassis.
Here is mine:
Sorry for the unfocused picture, 11:30pm on your back under the car after a day at work is at best questioned???
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