[wrench87]

factory five has this problem also, i was told it was how the mufflers were welded inside the pipes. what i did was drill a hole near the weld on the underside of the pipe to locate the edge of the muffler it may take a fe holes to find the right spot then i drilled a large enough hole and plug welded it , i then ground down the weld and used high temp ceramic paint to match the coating on the side pipe. the screws are alot easier though.