I'm
United Motorsport - got this in Toronto somewhere...linked through the UM site.
Integrated Engineering is the other common one for 2.5's. There's a few on here with that tune. I've read a couple of threads saying IE isn't what it used to be for support etc, but, can't speak to it directly.
It's not adding a ton per say, but, it changes the dynamics of the rev range,
gets rid of the rev hang and with the: intake, stage 1, good plugs, coils, and good oil and going up to 91 octane changes the character of the experience and wakes the 2.5 up. Sounds so much better and feels less restricted.