Autocross Cup Series: Race #2

[SomebodyDial911]

If your one differential is open, you do not check the box, from what I can tell. Seems pretty black and white. Here is the additional detail under that modification option:


Modification Question
Select this option if the car has any of the following: The transmission has a limited slip differential of any design, stock or non-stock, whether or not it was standard equipment. NOTE: If the car has more than one differential, this option must be checked if any differential is a limited slip unit.