Quote:
Originally Posted by chrisl
From what I can find, the Viper that holds the 7:12 on the 'Ring ran Pilot Sport Cups, which are the exact same tires Chevy supplies on the ZR1 (and I have no idea what a "PSSC" is).
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PSSC. Pilot Super Sport Cups. Viper is Dot R compound, ZR-1 is road legal PSSC Zero Pressure. Not sure how much different.
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