ok, hope this clears some of this up. the inserts are for the 2 side mounts, passenger and driver. take a look under your hood, you'll see them. the full replacements, those red ones with the gold brackets, are for front and rear. front is easy to get to, as the rear is hard to get at.
as for the mount bushings, also red, those are replacements for the awr mounts for front and rear. i don't think those will go into the factory brackets... otherwise wouldn't awr sell just the mount bushings instead? yeah.