The Power Commander V fuel controller gives you the ability to use a preprogrammed SLP map or to create a custom map of your own. Some PCV models also allow ignition timing control capabilities that provide a good horsepower improvement over just controlling fuel alone. SLP has maps for most popular SLP engine configurations. However, if you choose to make a custom map for an engine configuration not supported by SLP, the PCV has the ability to be outfitted with optional tuning/monitoring accessories such as Autotune, Wideband 2 and the LCD display