The installation of this packing was pretty easy. I didn't trim it at all, as it fit pretty well from the start. no bits of loose fiberglass to deal with. The adhesive bit makes it pretty easy to wrap around the core, and the canvas-like cover makes it slide into the can quite nicely.
It's a bit pricy, and next time, I think I might opt for a less expensive alternative.
My old packing was in bad shape, but, it doesn't really seem like my exhaust is any quieter with this new packing in. I have *not* tested using a sound meter, but I do hope to get a reading soon, while this stuff is still new.