Description Our exhaust manifold is made of high-quality 201 stainless steel, electroplated low-carbon steel flange, and mirror. The computerized bending technology ensures smoother exhaust flow, thus improving emission performance and reducing back pressure. Fitment : 1999-2004 F-150 Pickup Lightning and Harley Davidson Edition 5.4L V8 Supercharged Models ONLY 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

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