Well, I bought a set of slash cuts to install. Told me it had the converter. Turns out they both have the converter so apparently I was sent to right(?) sides. Lovely.
The converter wasn't what I'd pictured. Figured it would be pellets to get out. Turns out it's layers of metal in an interesting patter. Cutting it looks impossible without knowing what a cutaway version looks like.
The end has the usual look to it, but the engine side doesn't. Not sure anything can be done, or that I can run them.
Sigh.