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I'm new, I own a 2012 Brembo 5.0, Black with Grey interior, no bells and whistles, only the ones that count. 3.73 rear end, 6 speed, Car is stock except for SLP axle back Loud Mouths. Put on DYNO 380 HP at 345 ftlbs, was told I have a Factory Freak. factoring back in the 18% loss that puts the real crank HP at about 445???