G37Xtreme

This isn't the best thread to ask this question.
I'm also not sure what you mean. Are you asking about the sport shifting? If so, push the automatic transmission shift **** to the left. You should see DS in your cluster display instead of D.

Now, you're in sport mode. If you leave it alone, it will shift more aggressively and also downshift earlier when braking. While in sport mode, pressing up and down (forward and back) on the shifter will let you manually change gears.

This only applies to the automatic transmission models.