I ran 12.1 bone stock on the factory runflats (A8 though). Aired them down to 26-27 psi, did a quick burnout to clean off the tires, and went after it. M6 is obviously harder to duplicate. 
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2017 Chevy Camaro 2SS A8 Whipple 3.0, Mast Black Label heads, ATI 8L90, Fore triple in-tank pumps, 112mm TB, LPE +52% injectors & BB HPFP, TooHighPSI/Katech port injection, 15” conversion 1066 WHP STD/1027 SAE, 9.10@152.5 (new times coming)
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