My bad. So it was 12.1 at the collector. Can you check the heads up display on this? I hear it may read 11.8 like mine. And it seems according to the hellcat forum members that 11.8 is about 12.1 with a device that you used. Basically Dodge got it right by having it run lean at 12.1. Did it take more timing at all rpms with the leaner afr of 12.1? If so how many degrees over stock? What type of gasoline were you using?