A modification package for certain diesel vehicles, specifically those manufactured by Volkswagen in 2012 and equipped with a TDI engine, involves removing components related to the exhaust emissions control system. These components often include the diesel particulate filter (DPF), diesel oxidation catalyst (DOC), and exhaust gas recirculation (EGR) system. The package typically includes hardware to physically remove the components and software to reprogram the engine control unit (ECU), preventing error codes and optimizing engine performance in the absence of the emissions control systems.
The appeal of such modifications stems from potential improvements in fuel economy and engine power. Historically, these systems have been viewed by some vehicle owners as sources of maintenance issues and reduced performance. While such modifications may lead to enhanced engine operation in certain metrics, it is critical to acknowledge that they can render a vehicle non-compliant with emissions regulations. Furthermore, removal of emissions control systems can have adverse environmental consequences due to increased output of harmful pollutants.
