Boost Tube Upgrade Kit 2007-2009 Ram 6.7L Cummins Banks PowerOEM replacements for left and right side boost tubes with silicone couplers. 40 percent greater flow area compared to stock. Better flowing intercooler tubes results in less boost pressure loss allowing for more air and fuel to be delivered to your engine resulting in maximum horsepower. More density maintained from turbo to intake. These boost tubes are designed for serious horsepower. Banks hot and cold side tubes have 40 percent greater flow area