ya know, not quite sure what muff it for sure. some sort of new 40 series. if i recall, they dont make the originals anymore? idk it was new though. but i went to some back alley shop where they charge half of what they charge at bigger shops for labor.
and yeah, backing it up to the cam, lets you hear it under load a little bit. instead of just idling and revving it in park. lol
and what do you mean edited down?