Banks Boost Tubes Upgrade 2011-2016 Duramax LML Cognito 4" 9-inch wide wheel with 5-Inch

9-inch wide wheel with 5-Inch back space

The adjustable torsion key provides 1” to 2” of lift and gives clearance to add up to 33" wheels and tires to your GM HD Truck

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Banks Boost Tubes Upgrade 2011-2016 Duramax LML Cognito 4" 9-inch wide wheel with 5-InchOEM replacements for left and right side boost tubes with silicone couplers. Up to 105% greater flow area compared to stock. Better flowing intercooler tubes result in less boost pressure loss allowing for more air and fuel to be delivered to your engine resulting in maximum horsepower. These boost tubes are designed for serious horsepower.