My goat is M6 but I have a Vig in my fun car, it is superb!It was the 4th[yep] I tried and the only one that really worked.I love it's street manners, even at about 3600 stall, and it locks seamlessly on the highway when I want it to.I dyno'd much lower than I thought with it unlocked, and FI tuning issues prevented a locked pull that session.The#s were definately not consistent with my ETs.I wouldn't worry about dyno #s if your ETs [or street kills] show you're putting power down.Dynos are great tuning and A/F tools, but they aren't the end-all acid test, with so many factors involved.Go look at what Smitty from AZPS is doing with "500horses" on the dyno.......same style converter as me.
If you're worried about it, you can send it back for a free checkup and restall [maybe your stall rpm isn't right for your app. if actual performance is suffering]
Their service is superb, I had it in for a checkup and needed it back ASAP>I paid for next day air there but they picked up the NDA on the way back no charge when they heard my predicament.