Removing emissions control systems from a diesel truck, often referred to as a “delete,” involves physically removing or electronically disabling components such as the diesel particulate filter (DPF), the diesel oxidation catalyst (DOC), the exhaust gas recirculation (EGR) system, and the selective catalytic reduction (SCR) system. This process can alter the vehicle’s emissions output and performance characteristics.
Modifying emissions systems can impact a vehicle’s compliance with environmental regulations and may void warranties. The motivation behind such modifications often includes perceived performance gains, increased fuel economy, and avoidance of costly repairs associated with emissions systems. Historically, these systems have presented reliability challenges, particularly in earlier generations of technology. However, advancements in emissions control technology have mitigated many of these issues in modern diesel engines.
