Welcome Dewrag! It is a huge 7% on the first two gears. I have fooled with several things the clever folks on this site have suggested including a simple resistor you can wire into the system to make it think it is in 4'th instead of first or second. But the combination of Tuneboy and a Jardine exhaust is a real eye popper. I can't wait until you try it and tell us what you think.