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From tire rack pdf
O.E. components or components speci cally listed in the Stage 1 and Stage 2 Packages below may be used. For components not speci cally listed in the Stage 1 or 2 Packages, the Solo Street Category allowances apply. Vehicles will be allowed to be “under prepared” without all allowed modi cations being installed.
My understanding is like everyone else spec parts or stock if listed. So it's gonna be stock springs or eibachs springs. Exhaust airfilter swaybar endlinks and other usual street class mods will be allowed. I also feel that it will be that way with the wheels as well. It will be 17x8 17lbs wheels or the stock unless they split cars in stage 1 and 2. Maybe then street class rules might apply to cars in stage 1 since no spec wheel is listed. That is all assumption
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