Unlike the stock, failure-prone exhaust manifold, Banks TorqueTube is built of heavy, 409 stainless steel to weather a lifetime of heat, stress and abuse.
TORQUE TUBE SYSTEM, NON-A/I;Header Type: Shorty;Header Material: Stainless 409;Header Finish: Natural;Primary Tube Thickness: 16 Gauge;Primary Tube Length: N/A;Air Injection Ports: No;O2 Sensor Bung: No;EGR Bung: Yes;Gaskets Included: N/A;Reducers Included: N/A;Head Pipe Included: N/A;State Legal: 50 State;California Residents: WARNING Because the stock manifolds flange does not align squarely with the ports, flow is restricted. Banks Power TorqueTube Exhaust Manifolds (Natural) - 48004 Bolts right on! TorqueTube corrects the problem with a half-inch flange that is machined dead flat, and precisely fitted to the port pattern.