Low 13s is pretty good for bone stock... I haven't ran mine on a full 1/4 track yet. A few weeks ago on a crappy track with on & off drizzle and poor traction I ran on a 1/8 track and best I could do was 8.74 trapping at 83.4mph. My biggest problem was getting good grip from the dig. 60' times a tick over 2secs was proof of that. Only mod on mine is a CAI, all else is stock. Fun as hell though.