Boost Tube Kit Natural Finish Tubes 13-18 Ram 6.7 Driver Side Cold Side Only Banks PowerOEM replacement for left side boost tube (Driver side, Cold side) with silicone couplers. 67 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. This boost tube is designed for serious horsepower. Banks cold side Boost Tubes have up to 67 percent