A collection of components designed to bypass or remove the Exhaust Gas Recirculation (EGR) system on a 7.3L Powerstroke diesel engine. These kits typically include block-off plates, coolant rerouting hoses or plugs, and sometimes modified up-pipes. Its function is to prevent exhaust gases from being recirculated back into the engine’s intake, theoretically improving performance and preventing potential issues associated with the EGR system.
The motivations behind employing such a modification often stem from a desire to enhance engine efficiency and longevity. The EGR system, while intended to reduce NOx emissions, can introduce soot and other contaminants into the intake manifold, potentially leading to reduced airflow, increased carbon buildup, and even valve damage over time. Eliminating the EGR system aims to mitigate these issues. Historically, this modification has been popular in situations where emission regulations are less stringent or when maximizing engine output is prioritized.