PICKUP/EXCURSION: Banks Stinger-Plus utilizes Quick-Turbo to cut out turbo lag and strengthen turbo performance. Best gains of +91 hp and +162 lb-ft torque deliver more guts when you need 'em, with 11% better fuel economy as you haul a trailer or big load. If you like all that pulling-muscle delivered with a kick, Stinger-Plus is an excellent choice.;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:^Important - 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, 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: 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.;Pickups other than standard-cab long-bed or extended-cab short-bed require Exhaust Extension Kit.