What does a repacking kit do for an exhaust?

Question

what does the repacking kit do for an aftermarket exhaust for an atv or dirtbike?

Answer 1

It's new fiberglass packing to replace the old stuff that is used in the muffler to keep the muffler quiet. As a muffler gets older the packing breaks down and is slowly blown out the back as time goes on. So it has to be replaced every now and then. It's cheaper then buying a completely new muffler every other year.