If your 914 is 70-72 you'll want -00 & if yours is 73-76 or the front rotors/hubs have been replaced with late hub-centric ones then you'll need -01.
Here's a pic of what I used when looking for Fuchs 2L for my resto, but same applies for Pedrini, Mahle 4-lug "Baby Gas Burners" etc.
BTW - you can have that groove on the backside machined into a set of -00 wheels too, just use an -01 for dimensions.
QUOTE(SLITS @ Apr 23 2013, 05:27 AM)
From my bad memory ....
"00"s fit early non-hubcentric cars.**
"01"s fit hubcentric cars.**
** Fronts only ... all will fit the rears
It's just a matter of a larger hole in the center to go over the front rotors on a later car.