Going up to the next prep level makes the car completely noncompetitive based on the other cars in the class (a lot of turbo charged, monster power cars including GT-R's iirc). Additionally, the money to prep the car for the next level gets pretty crazy. Just to have a rule book built car for the class I run is somewhere around $30k.
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'11 370Z Nismo #528 Fast Intentions | Stillen | Motordyne | Uprev | CSF | Zspeed | Z1 Motorsports | AST | Swift | SPC | SPL | Whiteline | Hotchkis | Bride | Schroth | Robispec | Cusco | Nismo | Volk | Forgestar | Hoosier | RJM
'17 Titan Bone Stock
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