Boost Tube Upgrade Kit 2010-2012 Ram 2500/3500 Cummins 6.7L Red Powdercoat Banks PowerIncrease flow area up to 37 percent over the stock boost tubes with Banks' huge 3 1 2 inch boost tubes. Stock Ram tubes are plastic. Banks boost tubes are 3 1 2 inch constant diameter mandrel bent Aluminized Steel with larger radius bends. More air allows for more fuel which means more horsepower. Are you running the new bad ass Banks Monster Ram for the 6. 7L Cummins? Banks boost tubes are larger than the factory pipe and designed to work with the