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RUFdriver,
Yes, Porsche does offer a very efficient locking system. I worked for Porsche for a number of years, at the race track and on production cars and super cars like the Carrera GT.
The center lock wheel nut has a number of teeth that lock into center lock nut via a ratcheting mechanism inside the spindle. When the wheel center lock nut is torqued to specification with a torque multiplier adapter the center lock nut and the locking device does not need to engage, if the center lock nut starts backing off the locking device will snap into the closest tooth on the center lock nut to keep it from loosening further.
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