AirDog II (DF-165) for 2001-2010 Chevy Duramax 6.6L in any chassis On Demand Flow 165 GPH Dual Feed Gerotor Pump: Quieter, More Efficient & Longer Lasting! Built-in Adjustable Regulator, Preset at 8 PSI Vehicle Applications: Fits all 6.6L Duramax engines in any chassis 2001-2010 (GMC, Chevrolet, Kodiak) Air Bubbles in Your Fuel are Hurting your Performance & Mileage,... This is Where The AirDog II Will Help! AirDog II Fuel Air Separation System - NEW Quick Connect! Drops installation time by 30-45 minutes! - Removes Air/Vapor from Diesel Fuel - Pure Diesel Fuel Reaching Engine - High Flow Rates of Fuel to Engine - Longer Injector Life - Increased Injection Pump Life - Increased Fuel Economy - Optimized Engine Performance - Increased Torque Output - Improves Throttle Response Kit Includes: - Relay Control Wiring Harness - New Filter & Pre-filter - Installation Manual - AirDog II Bracket and Spacer - Plastic Ties - 1/2" ID Fuel Line - 1/4" ID Air/Vapor Return Line - All Fuel Fittings Required - Mounting Hardware How the Demand Flow System Operates: The AirDogII, designed to operate at flows and pressures beyond the maximum requirements of the engine. The system receives fuel under vacuum from the fuel tank containing entrained air/vapor, particulate contaminates and unknown quantities of water. The fuel passes through the water separator which removes the large particulate contaminates that could damage or jam The gerotor fuel pump. The fuel, with only entrained air/vapor and tiny particulate contaminates remaining enters the AirDog II fuel pump. The fuel, under positive pressure flow, enters the second stage fuel filter. As the fuel passes through the filter media and the remaining particulate contaminates are caught and contained & free of contaminates & power robbing air/vapor and at pressures and flows always able to meet the needs of the engine, exits the fuel filter & passes into the fuel pickup tube and on to the engine.