100 GPH Lift-pump unit for 2001-2010 Duramax Trucks Latest/Greatest from AirDog.... The 4G Raptor Fuel Pump 01-10 GM Duramax Diesel 100 GPH Part Number: R4SBC133 Preset at 10 PSI Raptor Lift Pumps are a high quality supplemental lift pump that allows more fuel to flow than a stock pump. If you have an upgraded engine with larger injectors, etc., then the Raptor Lift Pump can improve fuel flow for improved performance. A large engine can starve for fuel if a better, high rate flow pump is not used, especially the Duramax engine. Built-in Adjustable Regulator No Return Line Needed Single-piece Pump Body Most updated AirDog design - Gerotor Pump Flow Rate of 100 GPH for this unit Easy Installation For stock to lightly modified diesel engines, a 100 GPH pump is recommended. For heavily modified diesel engines, a 150 GPH pump is recommended.