Banks Power 99.5-03 Ford 7.3L F250/350 Auto Stinger SystemBudget minded Stinger's upgrades reshape the fuel curve to match the improved airflow. With top gains of up to +68 hp and +128 lb ft (rear wheel), 10% more towing MPG and longer engine life. Banks OttoMind engine calibration module reshapes the fuel curve to match the improved airflow, to give you a more efficient engine that optimizes power right up to the shift points.; Test vehicle: 1999 F 350 crew cab dually, 2 wheel drive, 4R100 4 speed automatic