(2004-2010 models only) Everything needed for dramatic power gains. Pass, merge, and climb effortlessly. Adds up to +70 hp and +92 lb-ft (rear wheel), optimizes mileage and durability. Banks PowerPack features a revolutionary new Ram-Air intake system* that delivers greater airflow and air density for more power, plus an AutoMind Programmer (optional) for significantly improved response. A pair of stainless-steel, tuned-length TorqueTubes exhaust manifolds provide stunning torque output when you want it. Pass, merge and climb as you please: your PowerPacked coach won't break a sweat. Achieve best gains of +70 hp and +92 lb-ft torque at the rear wheels, with better fuel economy - and never require high octane.;Important: Some vehicle configurations require an extension kit for proper fit.;*Note: Banks Ram-Air intake system available for W-Series only. P-series chassis with wheelbases over 190 inch require extension kit. W-series chassis do not require extension kit.