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I have the Pirelli P7 Summer performance tires which are the best I ever had on any car, since I've never used Michelin PSS which will be next.
In my 225/45r18 and 255/40r18 size I run about 38 psi front hot and 40 psi rear hot, and feel like that is about best grip, wear, and street ride.
On AutoX put 38 and 40; you'll be close and it wouldn't raise temp from heat much.
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