Remove the bolts at the "entrance" end. Then place that end in a vice and pound the s**t out of the silencer body with a mallet.
MAN... you are NOT KIDDING! I just got finished taking mine off. I DO NOT RECOMMEND doing it like I did. I used a Rubber Mallot and had to smack a screwdriver all around the edge of the canister where it meets the insert. Doing this definitely uglied-up the aluminum something fierce. But in my case it seemed like the only thing that would work and removing that dang inlet. There's really no good way to grab that thing.
Can anyone tell me a trick for when I put this sucker back together that will make it more easy to pull back out of the canister body the next dang time I have to re-pack?
I assume I'm supposed to put high-temp silicone all around the edge of the inlet where it meets-up with the canister... but I'm wondering if that's really even needed? I was kinda contemplating maybe even putting a thick grease around it's edge to help ensure I can get the dang thing off next time. Would this be all that bad of a thing to do?