Introducing the Fleece Performance Fleece Modified CP3 Pump. This pump is designed to eliminate the factory fuel flow restriction that begins at 3,000 RPM in your 2003-2007 5.9 Cummins, allowing you to maintain desired fuel rail pressure through your entire RPM range. This is a cost effective upgrade that will provide better performance and reliability for your engine, giving you the peace of mind and confidence you need when hitting the open road.