So I have previously just had and won my first auto-x. I am now officially hooked. I beat everybody in my class but that just isn't good enough to me cause im still in B-Stock. What are the top 5 mods that you can do to the car to cut times in auto-x?

Better tires is #1
Improve the Driver is #2
Better Alignment is #3
The rest depends on the class you decide to run.

BS-> BSP-> SM
->STU

Try doing a search