Do a search for "My tune my story" or something like that... One of our members gave the results on a NON-SRT6.

Another of our members had an SRT6 done as well. The SI guys got (if I remember correctly) over 400 estimated HP and ft-lbs of torque at the flywheel. I forget how much they measured at the rear wheels. In the story is the price for the upgrade... not super cheap, but not Renntech prices either.