A modification package designed for certain 2005 Duramax diesel engines, this aftermarket solution typically involves physically removing the exhaust gas recirculation (EGR) system components and installing a device to alter the engine control unit (ECU) parameters. The components often included in the package are block-off plates, coolant rerouting hoses, and the electronic module used for recalibrating the ECU. The purpose is to disable the EGR system, preventing exhaust gases from being reintroduced into the intake manifold.
The impetus behind such modifications often stems from perceived performance and maintenance benefits. By eliminating the EGR system, users report potential increases in engine efficiency and a reduction in carbon buildup within the intake system. Historically, diesel engines employed EGR systems to lower NOx emissions; however, concerns regarding their impact on engine longevity and power output have led to the development and use of these aftermarket solutions. It is critical to acknowledge that tampering with or removing emissions control equipment is often illegal and can have negative environmental consequences.
