Ugg,L99,3.91's,Bmr suspension trailing, toes,springs, solid mm,air raid,tsp lt's,no cats, borla atak NASCAR loud,vitesse tc,moroso cc,bought car used from a nice guy?obviously is tuned shifts like crazy hard (neck snapping ) like a hammer could it be aftermarket torqe converter?? My first 5th gen.Was told it ran consistent 12.3s.New 2016 2ss couldn't hang with me pulling away from 25 to 120.