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I just received some 18" cayenne turbo rims which I bought on ebay . 3 of them have been mounted before and 1 appears not to have been previously mounted,this one has a rougher finish around the rim (the part that will be inside the tire when mounted)while the other 3 have a smooth finish. It makes me worry that one/all may not be OEM as they were advertised. Any thoughts / help?????

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On the inside of the wheel you should find the Porsche stamp.

(a "P" inside a triangle)

Porsche recently changed suppliers for a lot of parts, it's possible that the new wheel is from a different supplier.

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They all have the triangle with a P .It is made up of a thin triangle and a semicircle forming a P ,then all inside a triangle. There is also a BBS stamp . They look exactly like the 18" C turbos on my CS. Maybe I'll have to take one off to compare. I have not weighed them ,but I'll check .

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