Banks Power 05-08 GM 8.1L Mh-W24 (L-Exit) PowerPack Systemoptimizes mileage and durability. Banks PowerPack features a revolutionary new Ram Air intake system that delivers greater airflow and air density for more power. 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