We at Diesel Power Products have an insane passion for horsepower and diesels.  This is why we carry a full line of Casserly Diesel injectors for your 6.0L Powerstroke.  However, we also understand that you can't have horsepower without reliability.  A truck is only built to handle so much abuse before one must modify it in order to preserve its longevity.  And one of the weak points on ALL diesel trucks are the fuel pumps.  We highly recommend a modified pump and filtration system, such as a FASS, Pureflow, or GDP system, to help avoid costly repairs in the future, and to maintain fuel delivery to the engine, thus sustaining reliable horsepower and torque!