Well the srt8 is not As fast so you have an accurate butt lol my 5.0 with 373s does 0-60 in 4.8 real world test i ran it 6 times then averaged it but I did manage 1 4.5 sec run so I'd say 12.8 is not out of the question in the 1/4 mile if you know what you are doing in the srt8s you are lucky...