Your stock hpop will fall off at wot...some drastically. Big oil is a mod done to raise and maintain your icp in order to handle the demand put on it by your injectors. They come in a 2 pump and soon a single configuration. Great mod to do from stock injectors all the way up to sho b codes.
2008 F-250: High Powers / Dual K16 / 60% Nozzles