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If you are looking for a programmer, we usually recommend the Diablosport Predator for vans. It has a few different settings to choose from and also has the code reader among other features. We also carry a 4" turbo back exhaust kit for vans if you want to keep your EGTs down.
Most of us here like to stay away from off the shelf tuners/chips. Most of us have custom tunes. I have the DP-TUNER and they are also the sponser of our forum. There are others that do custom tuning also. You will find threads about chips on just about every page if you go back and read a little.