Diesel performance modules allow you to increase the horsepower and the torque of your diesel engine without having to reprogram the vehicles computer chip. They are usually very easy to install in places such as the gap between the computer and the fuel injection.

Those modules will provide all the additional horsepower by tweaking certain settings of the main computer chip. For example, there are modules that will electronically blueprint the injectors by taking out the 20% variance which was originally set at the factory. In the concrete situation, variance refers to the fuel pressure, fuel volume, and the injector pulse.

Diesel performance modules can provide up to 150 additional HP and 35% torque increase. Additionally, the fuel mileage can be increased by 10%. Regarding emissions, most of the modules don't violate the rules. Finally, the modules boast an increased engine life as well as lack of after marketing chips (this means that your warranty will not be void).

You may also me interested in other gauges that can determine whether or not your diesel engine is running at peak performance. Such gauges are pyrometers, temperature gauges, and turbo boost gauges (for turbo charged engines). These gauges cannot increase your diesel engine's power or torque, but they can certainly inform you of any less than desirable conditions in your engine.

All in all, diesel performance modules can be a very cheap and effective way to unleash the power that your vehicle is withholding. One thing to be careful about is that you don't rely only on numbers; try to see the actual difference that every module will make to your vehicle.