Major Diesel has been supporting the trucking industry for 15 years, helping truckers get the truck they deserve and not the one the manufacturer thinks you deserve. Tuning your ECM safely increases horsepower and torque which means you accelerate faster, spend less time grabbing gears and can hold higher gears and lower RPMs up hills.Upgrading your ECM is the only modification you need to see big savings, noneed for turbo, injector, manifold or cam modifications. ECM tuning will reduce your downtime and derates. If you drive in a professional manner(watch your pyrometer and perform regular maintenance) you will see the best gains and experience no problems whatsoever.