I called Brenspeed and Steeda with the same question.
The anwser I got was the same. Once I reload my stock tune on my 08GT prior to trade in, my SCT tuner will unlock. That said, I can purchase a2011 new tune , as long as it meant for and SCT Tuner, use my same SCT tuner with the new 2011 and download to my 2011 GT
Hope that was not too confusing...
2011 GT 5.0 Premium Coupe, Kona Blue, Interior Charcoal /Grabber Blue ,6 speed MT, Comfort Group, ,Brembo Brakes , 3.73 Gears, Security Package, Shaker1000, Polk Speakers, CDC Chin Spoiler, JLT Oil Separator, Custom Grille layout, HID, Brenspeed 93 Tune /Steeda CAI , GT500 SVT Axle Backs
A new Beast in disguise…..