I was driving it Saturday and I pulled onto a road and took it near redline in the first 3 gears. I noticed when I was almost to the top of 3rd the actual exhaust opened up for lack of a better way of explaining it. I didn't blow an exhaust gasket. It was almost like I pulled a imaginary baffel out. Its not a lot louder but its definitely louder. Reason I posted was to see if this has happened to anyone else. Its possible that a weld broke and let something move inside the muffler. If mine did I would think someone else's may have.