I didn't want to hijack the other guys thread so here's my question.

I have a set of Supertrapp 027-7853 mufflers that I believe are about 10 yrs old. They have a 20 3/4" baffle tube that is 1 3/4" OD. There were 18 discs on the end of each. When I pulled the baffles out, one side was missing about 2/3 of the fiberglass packing, the other side had large gaps in the packing. The holes in both tubes were about 50% plugged with soot. The tubes are in good condition after sandblasting, no tears or soft spots. Can I repack the fiberglass? If so, what do you recommend? Is there a service bulletin for this?