Without the baffles they are just open cans, I bet that was loud. 
You can get the packing at any shop that also sells dirt bikes, which is just about any dealer. I get it at my local Suzuki shop for wrapping the mufflers in my home made exhausts.
You can get the packing at any shop that also sells dirt bikes, which is just about any dealer. I get it at my local Suzuki shop for wrapping the mufflers in my home made exhausts.