I have the sct livewire with custom tunes from vivan and gearheads and im not really happy with either. I like the power on both but had both had to redo the tunes, With vivan i was getting a check engine light on with code p1000 witch means nothing. With gear heads my coverter wont stay locked up. If im rolling arond 60mph and step on the peddle on 1/4 to 3/8 of a inch the cinverter unlocks and somtime down shifts. Much like a gas truck. Now i have been a 6.4 with a spartin tune and that converter locks up and stays locked up as well as a 2012 LML duramax. Is it even posiable to have the converter lock up and for the most part stay locked up? I really think if this could happen my MPG would go up. Rant over just had to vent a little.