OK guys, work and tests are done. Executive summary, good for ~4 ft-lbs of torque w/o tune changes in the mid-range rpms, peak hp gain was negligible. I'll get the charts scanned and posted once I fix my scanner (hopefully tomorrow). I've seen people spend more money for less, overall I'd say it's worth it and I'm keeping mine.
Once we did the before & after run with no tune changes Brian @ RPT took the time to dial in some tune tweaks with timing etc. That added a little more to the fun curve and she pulls really well now.
Bear in mind I've already had a ton of mods done so dramatic results shouldn't be expected (and weren't). Subjectively, throttle response has further improved (which surprised me, it was already quite good) and she does seem to wind up a little faster. Like anything else I'll give it a few days and trips to settle in and keep an eye on mileage changes.
Would I recommend this part to others? I can say yes, I would. It doesn't appear to do any harm and anything that adds torque is OK by me.
Edit: here's the dyno chart...
G8-PowerWedge-NoTune-before-and-after.jpg
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