Banks Power Ram-Air Intake System (2011-2012 GM HD 6.6 Diesel)Up to 39hp and 69lb ft gain and outflows stock and competitors up to 35 Percent while reducing exhaust gas temps (EGTs). Exclusive 5 inch bellows prevents component damage Cooler temps Cleaner running engine Oiled or Dry Air Filter Element 50 State Compliant CARB E. O. D 161 146 Key Features Enclosed housing keeps out hot, power robbing engine air Reduces exhaust gas temps and sooty, black smoke. Inhales cooler outside air for more power and MPG