The Ultimate Power System for Towing & Work 1999-2004 6.8L SUPER-DUTY PICKUP: Banks has the formula for building V-10 muscle: the stainless-steel PowerPack adds best gains of +56 hp , +67 lb-ft torque, and 7 percent more miles to the tank-full. A pair of bulletproof TorqueTube manifolds uncorks major torque for big hauling and climbing jobs. Add Banks optional electronic AutoMind engine-calibration module maximizes power while keeping a stern check on the air-to-fuel ratio, for safe exhaust temperatures and engine longevity. Key Features Optimizes airflow, air density, continuous power and MPG Honors the host vehicle and improves longevity Best gains: +56 hp and +67 lb-ft (rear wheel) 7 percent more miles per fill-up BLACK tip US Patent #8,468,812 B1 49 State Compliant Not for sale in California