Id say diff and much much bigger tires should be your priority with that much power. Something like a 265 or 275 front and a minimum of a 305 in back should get you moving better.
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2010 Nissan 370Z 40th Anniversary Edition #762/1000 | Forgestar | Michelin | Swift | TRS | Z Speed | ARK | Z1 | Hawk | CFE | Evo-R | GTMat | Stillen | Seibon | Whiteline | Pioneer |
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