Which is better fro an 2003 Durango RT, Hypertech or the Superchip Flashpaq. Which one would give me the most benefit for both fuel economy as well as performance. Was thinking of also adding TB spacer. Any thoughts

 

TB spacers do not work for a MPI motor. They only work for carborated vehicles. You will be wasting your money.

Both are good. The new Hypertech MAX tuner is internet upgradable and that is a plus.

Also do not count out http://www.sctflash.com/ They are a little more money but they have some great intavations.