One must've been me! I've got a black '12 hatch with an Invidia N1 dual catback on it. I live in Camden and work in Thomaston so I'm going through there quite a bit.
EDIT: Oh, wait, are you the one with the grey STi I saw when we exchanged waves by Market Basket in Rockport? If so, nice ride, man. I think I've seen you around before, too.
On Tuesday I rode from Portland to Bath with a black LGT with some work done to it. Exchanged a couple of waves and did a few hard pulls. Had a good time!
EDIT 2: Actually just came across the name of the owner of the LGT: Busuto 05, had a good time cruising with you!