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Old 10-02-2012, 11:42 AM   #2
Frodo
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Join Date: Mar 2007
Location: Ohio
Posts: 1,999
You measure the total thickness, ie both inner and outer (plus the gap between).

My manual (covers '97 - '04) indicates different wear limits, depending on which model:


Boxster
Front: 22 mm
Rear: 18 mm
Boxster S
Front: 26 mm
Rear: 22 mm
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