Mercedes & Jaguar post tire psi settings for normal & high speed driving on the vehicle.
If I recall correctly it's 4psi higher for 100+mph.
I think Porsche lists their spec in the owners manual.
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OE engine rebuilt,3.6 litre LN Engineering billet sleeves,triple row IMSB,LN rods. Deep sump oil pan with DT40 oil.
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