I looked in my muffler & there is absolutely no muffler packing in there! My muffler got way too hot and melted 2 holes in my new side panel! So I got the company to send me a new free side panel! I ordered Moose Silent Sport Muffler Packing! I looked and don't see any rivets! What are you all talking about taking out these rivets? Do you have to go in there and pull out the thing that holds the packing in?