I recently acquired a 2006 4.7 Durango. I'm clueless as where to start for performance upgrades, with the exception of exhaust which I will not be doing. I have a 2002 Chevy Trailblazer 4.2, and I was expecting a little more out of my new V8, but it was anything but that. I put a few minor upgrades on the TB and she will run circles around the Durango. Any tips guys? Im also interested in things you guys do for extra MPGs. Through the mods I had on my TB I was making about 300hp at the wheels and getting about 23-24 highway.

 

I would start with a tuner from Diablo.
FF

 

I looked on there site and they only offered one for the 5.7 please correct me if I am wrong.

 

My fault. Only have one for the 5.7 liter Hemi.