Reverse torx socket size
 

I need the size on the reverse (female) torx socket for the engine mount on a 2003 Boxster S. (12mm nut)

TIA

I wasn't aware that the engine mount used the female torx bolts, but Id just buy a nice set of these in any case, you'll use it rarely but always great to have the tools. They are about 20 - 40 bucks on amazon depending on how nice and large the set is. They also sell these at home depot and any large auto parts stores.

Reportedly it is an E24, I shall see later.