Originally Posted by MADDOG
The DiabloSport Predator U7137, for the 5.7L HEMI Ram, has a 91 octane canned tune. So if you can get 91 or 92, this is the perfect tune for you.
At least for the 2009 Rams, it certainly does not. I'll take a picture of mine in the morning if you like.
Regardless, I'd still strongly recommend data logging as I mentionned before, no matter what tune you install and what gas you use.