Superchips may be able to create a custom tune just for you if you are looking for some specific setup. Of course, this will cost you some money. Up the limiter to 140mph, rev limiter around 6100, then WOT shift points at 5900 or so for 1-2 then 5850 of so for 2-3. You will notice gains with either the 91 or 87 octane settings, but sincegas is a LITTLE cheaper, Ihave beenplaying with the91 and its been a lot of fun. Also, those WOT shift pointsactually start from 1/2 throttle to the floor.Definatly do the updates every few weeks, as you also get all of theDodge updates that you would have gotten from the dealership. Remember to return to stock when you go for service. And the fastest I have been in my 2500was about 128- 130 and it scared thecrap out of me... big truck doesn't handle like a race car. Although I would do it in a heartbeat with a straightsection ofroad...

 

mine does go to 140, I had to look at my gps because our speed only goes to 120... i just maxxed everything out and my truck seems to respond well to it...

 

I got superchips too and goes to 140.
My friend ask me about bully dogperformance chip, but i never really tried it. Anyone have this? My friend wanna know about its performance. Thanks