Brand KAX Type EGR Delete Kit With High Flow Intake Position Front Fitment 2004 2005 GMC Sierra 2500 3500 HD 6.6 LLY Duramax Diesel 2004 2005 Chevrolet Silverado 2500 3500 HD 6.6 LLY Duramax Diesel Color Black What is the Exhaust Gas Recirculation? EGR stands for exhaust gas recirculation and is used in gasoline and diesel engines. In internal combustion engines, EGR is a technique used to reduce nitrogen oxide(NOx) emissions. It works by recirculating a portion of an engine's exhaust gas back to the engine's intake. This process keeps the engine cool while maintaining good fuel efficiency. Of course, it also reduces emissions-thereby keeping in tandem with the law. What Are The Benefits of EGR Delete?Improve Fuel Economy Increasing the amount of pure air and fuel in the combustion chamber results in a more efficient engine.Extended DPF FunctionWith a higher air/fuel ratio, your engine should produce fewer pollutants, meaning you can drive for longer before your DPF gets clogged.Simpler Repairs Without an EGR pumping exhaust gases back into your engine, you benefit from a simplified engine function and fewer pollutants in your engine, extending the life of your engine. Package Include1 x Nickel Plated Steel Exhuast Block Off2 x Hose Clamps1 x M10 X 20Mm Hex Head Bolts2 x M8X30Mm Allen Bolts2 x M10X30Mm Hex Bolts2 x M8X20Mm Hex Bolts1 x High Flow Intake Elbow1 x High Flow Intake Elbow Rubber Seal (O Ring) Installation TipsEverything needed for a complete install is included. Installation takes approx. 2 hours with basic hand tools. When installing this EGR delete; a DPF delete capable tuner is required to prevent any check engine light, diagnostic trouble code or drive-ability issues. FunctionCoolant temperature run cooler because they are not running through EGR Cooler. Eliminates soot build-up and clogged EGR Valves. Hot exhaust gasses are not being re-routed back into the motor. Warning Regarding Emissions LawsNotlegal for sale or use on pollution-controlled motor vehicles anywhere in the United States. Legal ONLY for off-road competition racing vehicles and cannot be used on vehicles that are operated on public streets, roads, or highways.