I've actually had 2 of these accessports from Cobb. Both were V3. I was forced to get a 2nd one after the 1st got stolen. This accessports features a lot of things but it is a very nice tool to have. You have multiple different maps for different fuels and driving conditions. It acts as a multi gauge for you to monitor your ecu parameters which can be vital in diagnosing problems or give you that ability to see small issues before they become large ones. Look over Cobbs page before you decided to purchase. It is an absolute must have.