Header flanges are extensively useful in many automobile applications. Most of these are made using 5/16″ or 1/4″ material. However, there are some other choices also like those cut from 3/8″ material, which are generally CNC laser-cut.
CNC Header Flanges are available with a range of head types, including Dodge, Ford, and Chevrolet. They are also generally available for imported models like those from Honda, BMW, Toyota, Porsche, Ferrari, Volkswagen, and Mitsubishi. There are engine header flanges and turbo flanges available. In case you are looking for a specific header flange and are not able to find it anywhere, you can check it with the manufacturers as most of them are ready to customize these flanges according to customer requirements.
Generally, a header flange is machined on a Mazak or Haas machine. They are generally made from cold rolled steel, mild steel or 304 stainless steel. The latter two are generally used for turbo flanges, while the former is used for engine header flanges. The heavier the material that is used for fabricating the flanges, the greater is the reduction of warping issues generally seen in lighter flanges.
Mismatch of header flange is one of the fastest methods to rob output power in automobiles, but still it’s often overlooked. This is why port alignment has to be taken very seriously. Providing the manufacturer with a port template before developing the header can go a long way in helping.
When buying header flanges, it’s necessary to look very closely at the flanges and check if there could be any misalignment with the exhaust ports. The flange has to be properly centered on the exhaust ports. This is vital to enhance its performance and get the best results. If not, the header flange could turn out to be useless in serving its purpose.