Just installed my set. Took a bit of time, but worked out well... mostly. I ended up dropping the whole rear subframe to do all the rears and the differential mounts at the same time. HOWEVER, 4-06-19621 does not fit the 2007 MS6 front LCA inboard bushing, and they do not make one for this application (yet?). I ended up getting new OEM bushings(GR1A-34-470) for that location for now as the originals weren't that worn. Is there some solution for this spot that I missed?
Their support was helpful whenever I asked questions, even if there is a significantly time zone mismatch. Took less than a month to show up when I ordered them.
Also, consider tack welding the pressed bushing sleeve to the arm, they won't shift that way. (Have water/ice nearby to prevent damage to your new bushings)