This forums has a final results thread I believe for finished numbers. Might wanna look in that thread. Stillen kits make around 400 give or take. A LS3 with those mods will be way faster than a SC Z.
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 Litespeed Racing Titanium Cold Air intake// GT Haus Axle// GarageLine combo// Nismo sway bars// Nismo Spoiler // Berk TP's
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