I wouldn't bother if you haven't already gone through this. Sat through some Youtube video on the repacking process and then went to work. Disassembly involves having to drill out some rivets as well as remove some hex headed screws, ended up with something entirely different than I had seen on the videos. This WR Silencer is a hollow perforated core, with 3 internal chambers, taking up about 4/5th of the cavity, not simply a tube, one offset tube in the front section of the chamber about 3/4 dia. of mid pipe runs into the center chamber,from there 2 different diameter tubes dump into the rearmost chamber. The insulation or packing is probably only 3/4 of an inch and wraps the core. So most of the silencer is air space. About 1/3 of the insulation was gone burned up I'm guessing. I didn't really want to spend the money on an aftermarket, but I'm not real impressed with this design. Beginning to see why so many go with the aftermarkets.