Big block exhaust is still loud

CMCE said

If you can find the room, these resonators from Vibrant work very well.
Vibrant Ultra Quiet

Click to expand...

The picture looks round but the dimensions say 6.5"x4.75....so they must be oval. I doubt that they get that hot by the time the exhaust gasses reach them, but something to consider as they would be right next to fuel tank with little cushion.