The Ford OEM "Blue Spring" Fuel Pressure Regulator Repair Kit (Part# 3C3Z-9T517-AG) is one of the easiest 30 minute installs you will ever do! Not only is this a preventative repair item it can also boost your performance if your factory spring is weak. Most 6.0's see an increase of 10-12 psi of fuel pressure. The added fuel pressure will help keep the injectors from out flowing the stock fuel pump, meaning no air in the injectors, and an injector that will live much longer. Most trucks will actually quite down at idle, rev alot quicker and with the added fuel pressure it is not unlikely to see an increase in fuel efficiency. The kit does include all the O-Rings and hard parts to rebuild the fuel filter housing. This kit WILL NOT help injector stiction, the only problem that can cure or ease those problems is our Rev-X Fuel and Oil Additives. They can be found in the Fluids & Filters section of the website.