An aftermarket modification for certain diesel trucks involves routing exhaust vertically through the hood. This system typically includes exhaust piping, a mounting flange, and a hood cutout or specialized hood. The configuration alters the vehicle’s appearance and exhaust sound, often chosen for aesthetic or performance-oriented reasons. For example, a Cummins-powered truck might be fitted with this modification to achieve a more aggressive look and potentially improve exhaust flow.
The appeal of this setup lies in its visual impact and the distinct auditory experience it provides. Historically, such modifications have been popular in motorsports and among enthusiasts seeking to customize their vehicles. Proponents may argue for improved exhaust scavenging and reduced backpressure, although these performance benefits can vary depending on the specific design and installation quality. Furthermore, the altered exhaust routing can direct fumes away from the vehicle’s occupants.