Jolo, Is the muffler bracket for a 1933 Standard or Master.
The 1929-34 Chevrolet Master Price List catalogue shows part number 370933 as the "Muffler Support and Bracket" for the 1933 Master (CA), but no part is listed for the 1933 Standard (CC) for a "muffler support". The Master part has a band that goes around the entire muffler diameter.
The only exhaust system support part listed for the Standard is part number 473758, which is a "Muffler and Tail Pipe Support" and the graphic shows the part is only large enough to go around the pipes and not the muffler diameter.
I have never been able to figure out how to post photos on this website, so if you want to see pictures of the 1933 Master bracket, I posted them in the Chevrolet section of the www.AACA.org
The only new exhaust system support part I have found on the internet for a 1933 Chevrolet is the tailpipe support for the Master and found on the Filling Station website.
Maybe a 1933 Standard owner can shed some light on the Standard configuration if that is the model you are talking about.