Boxster rims come in offsets from 40mm-55mm depending on width and diameter.
Anything from the front of a 928 has a 65mm offset and 993 rear (16's) wheels had a 70mm offset on the rear wheels (9's) which is the most offset I've ever seen on a Porsche O.E wheel.
The easiest way to work out which arms are which... the early ally arms have the same rear disk as the Steel arm'd brakes where as the late ally arms have a rear disk which has an extra shoulder on it out towards the wheel.
Email me and I'll send you pictures of all three setups.
MG
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Performanceghia is still alive and kicking...
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