i just purchase a sliver bullet phat shaft 66. i was wondering whats the best size injectors to run. i was currently going to run 5x0.14. But i was told that i should move up to a 5x.016. I dont do much heavey towing just a horse trailer every now and then. Its mainly just a daily driver.

 

Moved it to 12v performance for you, may help you get some more help. If you do some searches on here you should be able to find some good info on the subject as well.