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my 06 Boxster S says 30 psi front/37 psi rear for the 18's.
I also run them at 28/36 for better wear pattern. They were wearing in the middle from over inflation.
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Sold - Black on Sand Beige 2006 S - 48K miles
18x8.5 and 10 OZ Alleggerita HLT Anthracite wheels and anthracite Cayman side grilles - lovingly adjusted Schnell Short Shift
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