aFe Power Diesel Fuel System - Boost Activated for GMC Sierra 2500 HD Duramax 2001 - 2010

Built-in Bypass For Stock Fuel System:Allows vehicle to bypass the DFS780 pump under light loads, reducing wear & tear on the DFS780. Also allows engine to run even if the DFS780 unit were to fail.Clear High-Impact Polycarbonate Sight Glass:Allows visual inspection of fuel.Helical Bronze Spur Gears:Bronze gears more forgiving of contaminants than steel gears. The helical spur gear design runs quieter than straight cut gears.Billet 6061-T6 Aluminum Manifold:Eliminates porosity concerns with cast aluminum."Marine Grade" Motor:Protected against dust intrusion and powerful water jets.Plug & Play Installation:Supplied harness attaches directly to battery and utilizes Deutsch weather-proof connectors. No cutting or modifications of the stock fuel lines required. Vehicle can easily be returned to stock.Boost Activated Pump Engagement:Supplied preset boost switch activates pump only under load, reducing wear & tear on the DFS780.PEEK Bearing Wear Surfaces:The DFS780 spur gears ride on PEEK (Polyether Ether Ketone) bearing surfaces to reduce both noise and wear.Contoured CNC Machining Of Manifold Passages:Enhances flow through the manifold to reduce pressure drop due to flow restrictions.Direct Bolt-on Steel Mounting Bracket:Heavy duty bracket mounts to the frame and utilizes existing hole to secure.Fuel Pressure Gauge Port:1/8 NPT port allows customer to attach an external pressure gauge to monitor fuel pressure.O. E Quality Viton Seals:Compatible with diesel and biodiesel fuels.Emissions Disclaimer: Some or all of the applications listed are 50-state exempt, please see CARB EO# D-550-37 for details.