Do you mean the TDO4L? and 13.49 with stock exhaust in a 1190kg gsr? That is very impressive.
Best I got out of the tdo4l was 13.75 with;
K&N Airfilter, Split dump, 3" Exhaust, upgraded intercooler, cushioned ceramic clutch, tuned and bugger all fuel in the tank and driver 80kg..