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 1989-1993 Ford 460 Truck, E4OD Automatic Transmission Key Features: Virtually indestructible 100 percent Stainless Steel Mandrel-formed tubes tune exhaust flow for maximum torque Maximize exhaust extraction Flanges welded on both sides, then milled flat Seamless high-velocity collector Pulls exhaust and slashes backpressure Includes two full manifolds and stainless Y-pipe 5/8 inch thick flanges won't warp or flex No sealant/gaskets needed No need for factory heat shields Runs cooler to protect expensive plug wires US Patent #6,634,171 B1 50 State Compliant CARB E.O. D-161-41