Depends on if it's too restrictive.
Put too much back pressure on the engine and you can start burning stuff up.
I would think that a RM250 silencer would be too restrictive on a 500 (that is what you're talking about since it's in the hybrid section, right?).
On a 250 probably no big deal, might gain some power, might lose some power, mostly likely lose some power, probably have fitment issues, and there's no telling if it'll do a better or worse job silencing the exhaust.