The tune doesn't make the psi, ha. The pulley sizing and intercooler / piping length is what dictates that.
Um just says that their tuning is supported to X number. Doesn't mean you'll make that.
Also the gearing on the straight cut is 3.45 as oposed to 3.6:1. So it will make the same boost sooner. Not really more psi rather, sooner
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