Budget-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 trans. Towing combined vehicle weight: 20,000 lbs.;Horsepower and torque measured at rear wheels.;Fitment Notes: Some vehicle configurations require an extension kit for proper fit.;1999 Power Stroke variations:^Ford trucks for model year 1999 fall into three categories: 1999, Early 1999-1/2 and Late 1999-1/2.;It is important to know the specific model. Check the build date on the tag inside the driver's door, then match below:^1999 model year - built prior to 1/99 with catalytic converter.^Early 1999-1/2 model year - built prior to 1/99 no catalytic converter. Intake manifold has 2 inch-diameter inlets.^Late 1999-1/2 model year (built on or after 1/99, no catalytic converter, intake manifold has 3 inch-diameter inlets).;1999-2003 F-350 cab-and-chassis (no bed) trucks: If fuel tank is behind rear axle of the vehicle, use systems for F-450/550 trucks.;1999-2003 pickups other than standard-cab long-bed or extended-cab short-bed require Exhaust Extension Kit.;Stinger not available for 2001-2003 (275 hp) pickups.