1999-2004 Ford F150 Pickup V8 5.4L Long Tube Header Exhaust Manifold w/O2 Sensor and EGR

Description The exhaust manifolds found in the 1999-2004 Ford F150 and F250 were designed to combine the exhaust gasses from each of the cylinders quickly with a manifold that was cost effective to produce. Our 4-1 Long Tube off-road headers are designed to allow the exhaust gasses to flow more freely from each 4 cylinder bank and combine more efficiently. Tubing has been optimized for the 5.4L(330ci) engine. This creates a reduction in cylinder backpressure and improved exhaust gas velocity. These improvements free up lost horsepower and torque. An added benefit is a more performance oriented exhaust sound. Features Made of High Quality T304 Stainless Steel Material 2 X 4-2-1 Racing Spec. Design for High Air Flow Rate Inlet Size: 8 X 1.625" Diameter Ports Outlet Size: 2.375" Piping Diameter: 8 X 1.625" Manifold Pipings; into 2 X 2.500" Exhaust Pipes O2 Sensor Bungs and EGR Bungs Insertion; Metal Gasket Included TIG Welded CNC Machine Flange Increase High Flow Air, Instantly Gain at l