aFe Power DFS780 Series GM 11-16 Diesel Trucks V8-6.6L (td) Boost Activated 8-10PSIThe diesel fuel in your truck contains contaminants dirt, water and air vapor which is reducing power and damaging your diesel fuel injectors. aFe's POWER DFS780 Diesel Fuel System, with its patent pending design, is capable of removing power robbing debris such as air, water and other contaminants. The DFS780 also boosts fuel pressure ensuring constant availability for the high pressure pump, improving throttle response and horsepower at all RPMs.