Flashark Ford 5.4L V8 Exhaust Header – Fits F-150/F-250 1999–2004, O2/EGR Compatible

Replacing or upgrading your exhaust header is necessary for both engine performance and sound. Whether on or off the track, exhaust headers provide more horsepower and improved exhaust sound. FLASHARK offers many products to help you create your own custom engine headers. It's really easy and convenient to use: direct bolt-on, no modification needed.

Specifications:

Brand Name: Flashark
Certificate: ISO9001:2000
Application: Automobile Exhaust Header
Material: 201 Stainless Steel
Surface: Mirror Polish
Model: EH28139

Details

Design for High Air Flow
Inlet Ports Size: 1.575"
Outlet Ports Size: 2.405"
Total length: 14.2"
Manifold Pipings: 8 X 1.625"
Exhaust Pipes: 2 X 2.405"
Made of High-Quality T304 Stainless Steel Material
8-2-1 Racing Spec. Design for High Air Flow Rate
TIG Welded CNC Machine Flange
Increase High Flow Air, Instantly Gain at least 10 -15 Hp. / Tq.
O2 Sensor Insertion Bungs, EGR Bungs and Metal Gasket Include
Includes: 1 X Set of Header Exhaust System; Hardware, such as Gasket(s) and Bolt(s)

Exhaust Header VS Manifold, which is the better choice? 

The structural differences between exhaust headers and manifolds are the material and size. From the material, exhaust headers are made of lighter, thinner steel, while exhaust manifolds are made of thick iron. Exhaust headers are also longer than exhaust manifolds. When in use, exhaust manifolds create back pressure, which lowers performance. Because each cylinder of the engine is given its own tube, however, headers eliminate this problem; thus, allowing the gases to exit without the creation of back pressure. Therefore, exhaust headers are a BETTER choice than an exhaust manifold.