It's a 73 cb 750 with stock 4 into 4 exhaust In good shape only one blister on one pipe but no holes I see what looks like a circular diffuser towards the end but inside the pipes.
The baffles appear to be inside, thats all I can figure for now, someone before me must have punched the exhaust. I mean it when I say this thing sounds scary, as loud as some of the Harleys that fart around here, I even called My buddy that Rides a harley while I had him on the phone I kicked it over He laughed and and said"thats fu@#$%* loud".
I don't plan on firing it up until an oil change and carb rebuild done, and the electrical gets squared away.
I am not too worried about the noise bugging the neighbors, where I live there seems to be a high concentration of motorcycles in my neighborhood in the mix are two Ducatis that are loud as hell and up the road seems to be a retirement community of hells angels and outlaws(buttloads of Harleys)