If your not sure if the programmer is locked to another vehicle, don't even bother. Not trying to change your mind on what your looking at, but I just purchased a diablo sport for $287 brand new with free shipping. I know its $87 more, but the warranty it comes with and the fact that I know it is not locked to another vehicle is worth the extra money. Just a safer route unless you know it is unlocked. I'm sure if you look hard enough, you can find a superchip's tuner for that price. Both brands seem to be priced alike.

 

It costs $100 to unlock a vin locked tuner from superchips.

 

Those running the 91 performance tune . . . any of you running it on a 4.7 engine ? I've been running the 87 tune and have seen an increased mpg. If anyone can throw me some info on whether it's a yay-nay on the 91 tune for my 08 4.7 I'd just rather know of any downsides . . . if any. That and I'm not sure if you're 91 oct is cheaper in your neck of the woods LoL