I have not had the chance to race either of those yet but I will if I ever get a chance. Judging from the performance numbers a Mach 1 would be a very close race for a Box S. They seem to run high 13's like the boxster. The 320hp cobra's would be more of a challenge but certainly not impossible to beat if the boxster was driving well and the other guy doesn't really know what he is doing. If I ever get a chance at either I will post up what happens.
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