Originally Posted by ScottyM

Either get the job done well. The true 5 port will have slightly better fuel mileage, while the 5+2 will give a touch more power..

Run time will be around 10min 30 seconds on either of them once fully broke in. Barely enough for 10 minute pits on a short track, but medium to big tracks will require a 9-9:30 pit clock..