Originally Posted by SAM@GTM

When it comes to the difference between the GTM and the stillen kit in term of software and tuning, the only difference is value. with the GTM kit you get everything that uprev offers. You can flash your ecu you can data log you can check for codes and if you decide to get a custom tune all you have to do is go to a pro dealer and just pay for the custom tun it self, your ecu is already licensed and any uprev tuner can tune it, you can even tune it yourself if decide to buy the tuner version of the software and then you will have the same access to all the tables that i have access to . You just have to know what to do .

Now when you buy the stillen kit, you can only flash the ecu with the tune that was given to you, you can not data log, you can not do anything else . And in the event that you want a custom tune then you will have to pay again to licensed the ecu in a matter of fact no other up rev dealer can tune the car with out licensing the ecu from scratch .

Sam