10: Diesel Smoke Chips
We’ve all been at the red light and had a “bro-dozer” blow a plume of black smoke in our face. This is not a common occurrence from most diesel engines; in fact, these are customized performance chips that are purchased. The problem is that the black plume of smoke doesn’t increase the performance at all, and in the long run it just negatively affects the environment.
In some municipalities, these chips are downright illegal although many still opt for them. It is cool that you can tweak your exhaust to make different colors and smells, but in the long run, there is no point to this. Most people who own a diesel truck are going to be using it for hauling and not the other way around.