times a year but drive the high 5 to work and back on almost every good weather day. It takes some getting used to but it's absolutely necessary if you plan on launching on sticky tires. This max street I had is the old version with plenty of miles on it but... [ http://twinturbo.net/nissan/300zx/forums/general/view/2564130/First-and-only-11-second-run-at-22-24psi-on-stock-turbos.html ]
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