The Legacy Comp Hot turns up the power in level 5 and fuels past 2,800 RPMs to 3,200 RPMs at a faster fuel rate than the standard Comp. As a mild to wild performance upgrade for the driver who wants adjustable power, added towing capacity, improved fuel economy, and extreme power on a budget. Perfect for customers who already have gauges in their truck and now want better performance. The Legacy Comp module maximizes engine efficiency by monitoring the RPM, timing, turbo boost pressure and fueling parameters of your Cummins engine. Using this information to determine and control both fueling and timing enhancements for the Bosch fuel injection pump, Legacy Comp dominated the 2nd Gen market for two decades. Timing and fueling enhancements are controlled via CAN-BUS through the Data Link and by connecting directly into the Bosch fuel injection pump. Level 0: Stock Level 1: 40 Horsepower - 150 Foot Pounds of Torque Level 2: 60 Horsepower - 200 Foot Pounds of Torque Level 3: 80 Horsepower - 250 Foot Pounds of Torque Level 4: 100 Horsepower - 300 Foot Pounds of Torque Level 5: 130 Horsepower - 350 Foot Pounds of Torque Fuels up to 3200 RPMs with aggressive curve