Virtually indestructible 100 percent stainless TorqueTubes maximize exhaust extraction, unleashing gobs of torque that'll jam you into the seat and haul you up the grade. Banks heavy - wall 400 - series stainless TorqueTubes include two full exhaust manifold assemblies, each with a seamless high - velocity collector. Unlike the restrictive stock setup, Banks TorqueTubes literally pull out the exhaust, unleashing greater torque and helping the intake stroke to draw in more air. Includes all required hardware. 5 - Year Limited Warranty Torque Tube Exhaust Header System for use with 2002 - 2011 ChevroletGMC 4.8 - 5.3L, Non - AI (No Air Injection). 50 State Compliant CARB E.O. D - 161 - 106