Agreed, 12.7 is very unlikely in a stock 370z. Also a 12.9 is very fast for a stock Z, and you might want to consider not running your tire pressure at 20psi that might actually be working against you since at that low of a tire pressure the tire will go concave in the center.
DAN
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-My BRZ with exhaust will decimate all if we overnight parts from Japan-
10 Civic EX Sedan- Current Daily
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