Wonderful experience. The folks at Speedway took care of my exhaust leak, no problem. But they had a good chuckle at the terrible workmanship from Valley Muffler. Speedway threw out Valley Muffler's crap, then used a proper dampener, which is basically a metal piece welded to the pipe then looped into a piece of rubber to allow flexing, but avoids clipping the chassis. While they were at it, I had them throw on 4"" exhaust tips making my mustang look and sound meaner than ever.