Exergy 11-16 Chevrolet Duramax 6.6L LML Improved Stock CP4.2 Pump - E04 10504

Are you loosing rail pressure from a worn out CP4.2 pump? Are you in need of a factory replacement pump? From stock up to 550+HP Exergy's Improved Stock LML CP4.2 pumps are the best and most affordable solution for an upgraded pump that won't require supporting modifications or tuning. Exergy's Improved Stock pump comes with Exergy's System Saver Inlet Metering Valve installed. This inlet valve replaces the factory single layer 85 micron inlet screen that is molded in a plastic frame with Exergy's two layer 10 micron screen which is mounted on a stainless steel frame that will not fail when the screen fills with debris and becomes a restriction. Not only is the screen over eight times finer than the factory screen, but the addition of another layer further increases protection from debris. Based on a number of injector sets Exergy has tested from systems with a failed pump with a System Saver installed it appears that injector survivability is increased more than 85% when compared to pump failures with the factory screen. There are further improvements beyond the fuel system saver: - Pump followers are now pinned which prevents the buckets from rotating, causing the roller to grind along the cam. - Rollers now have an increased diameter which makes them less susceptible to contamination jamming the roller. It also lowers the stresses at the cam/roller interface. Let Exergy give you peace of mind with your fuel system purchase! Note: Though a lift pump is not required, to achieve maximum pump performance a fuel supply of 150 GPH @ 8-10 psi per pump is recommended. This pump can be used as a direct replacement for Bosch part numbers 0 445 010 616, 0 986 437 421, and 0 445 010 817, as well as GM part numbers 98077841, 12645102, 12638262, 12658095, and 12661059.