If anyone is interested in what the inside of the 600 muffler looks like... . someone over at the "other" Diesel forum posted this...
http://www.dieseltruckresource.com/dev/showthread.php?s=&threadid=42695
DanDee
http://www.dieseltruckresource.com/dev/showthread.php?s=&threadid=42695
DanDee