The Ultimate Power System for Towing and Work. Gain up to 104 hp224 lb - ft. 14 Percent more towing MPG. Chrome tip. Includes TwinRam. 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. PICKUPEXCURSION PowerPack rips the lid off 1999 - and - up Power Stroke potential, utilizing Banks' exclusive 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 - 12 (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 - 12 and late 1999 - 12. 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 199 with catalytic converter), Early 1999 - 12 model year (built prior to 199, no catalytic converter, intake manifold has 2 inch - diameter inlets), Late 1999 - 12 model year (built on or after 199, 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 - 450550 trucks. Pickups other than standard - cab long - bed or extended - cab short - bed require Exhaust Extension Kit.