Stunning top gains of +104 hp, +224 lb-ft (rear wheel) and 14% improved towing mileage, thanks to Banks' intake, turbo, exhaust, transmission and tuning upgrades. PICKUP/EXCURSION: PowerPack rips the lid off 1999-and-up Power Stroke potential, utilizing Banks' exclusive Techni-Cooler intercooler assembly and TwinRam manifold inlet assembly to pack more cool, dense air into engine. The difference is stunning: with top gains of +104 hp, +224 lb-ft torque and 14% improved towing mileage, your Power Stroke can out-run, out-pull, out-perform and out-last any diesel on the planet. Note: Banks TwinRam manifold inlet assembly is included with 1999 & 1999-1/2 (early) PowerPacks (not required for late 1999 & later vehicles).;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: 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). 1999-03 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.