We have some of the fastest TT3 (Mustang GT) and TTB (S2000) cars in the country here in NASA Texas. You will need aero and Hoosier A7 to be competitive with either. IMO the 370z is a tweener as it isn't fast enough for TT3 but gets to many points to fit into TTB with the needed aero and tires. Probably the best way to be competitive in the Z is to supercharge but detune to fit into TT3.
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