Airaid 07-13 Avalanche/Sierra/Silverado 4.3/4.8/5.3/6.0L Modular Intake TubeAIRAID Modular Intake Tubes (MIT) provide a smooth air way to the throttle body that improves air flow up to an additional 400 CFM over restrictive stock intake tubes in order to give your engine more horsepower and torque. MITs are constructed from cross linked, high density polyethylene, built each for a specific vehicle make and model, and can be used to simply replace your stock air intake tube or can be added to an AIRAID Cold Air Dam QuickFit