Which plug in performance programmer should I buy ?
I have bigger tires on my truck and need to reprogram the speedo, I also would like a bit more power from my 5.2 4x4.
Any comments Thanks.

 

I have the Hypertech PPIII but I think either would be great. I don't think there is much differance between the two. I bought completely by price as their web sites seem to have about the same information. If you check around you can find a group buy or check a lot of internet dealers. You will find a large differance in price from one dealer to the other. You also could find them on ebay all the time.