Finding the Correct Flanges for Your Hot Rod Project

What is a header flange?

The header flange is an important piece in a custom hot rod exhaust system. This flange connects the primary exhaust tubes to the engine block and allows the headers to be removed easily from the engine. The flange must be made of quality materials and to a precise measurement. If it is not made accurately or from the proper material, then there could potentially be an exhaust leak or warp and no longer fit to the heads properly.

If you replace a header flange with a low quality or thin flange, it might not last that long and you will be right back to having an exhaust leak and non-fitting headers. Thin flanges can change shape, or essentially warp, due to the high heat that comes from the engine. Hells Gate Hot Rods’ header flanges are made for many engine applications (the largest selection in a single location) and can also be custom made to fit your specific needs. Our flanges are built out of quality 3/8” thick, pickled and oiled steel that will resist bending or warping ensuring a correct and proper seal between the engine and exhaust system.

Most flanges for headers are used in conjunction with an exhaust gasket to help account for any imperfections or surface that are not perfectly flat and smooth. If you spend the time to make sue the finished welded header and mating surface on the head are perfectly flat, it is not necessary to use an exhaust gasket.

What type of header flanges are offered by Hells Gate Hot Rods?

Hells Gate Hot Rods has been making custom header flanges for more than 8 years now. They know the difficulty in finding the correct flanges for engines that are not as commonly supported by the larger aftermarket exhaust companies, which is what led to the creation of this hot rod company. Each flange is cut from P&O (pickled and oiled) steel. P&O steel is standard A36 hot rolled steel that has been dipped in acid to remove the mill scale and then lightly coated with oil to prevent surface rust. This leads to a material that is easy to clean and easily weldable without lots of effort to remove the mill scale. The flanges are all cut from a ⅜” thick steel with a CNC HD (high definition) Plasma Cutter. This leads to a clean and precise flange that will fit the exact engine application you are searching for and at a price that remains affordable.

Hells Gate Hot Rods is currently manufacturing over 50 different header flanges. We carry flanges for the following major car companies:

  • Buick
  • Cadillac
  • Chevrolet
  • Chrysler
  • Desoto
  • Dodge
  • Ford
  • Mopar
  • Oldsmobile
  • Pontiac
  • Studebaker

There are also some less common brands that we have cut previously, but do not keep in stock. Let us know what you are looking for and we can help you find what you are looking for. We know how difficult it is to find certain header flanges for you build. We want you to be able to finish your hot rod project, while enjoying every minute of the build. Looking for hard to find parts can cause frustration during a build and can halt a build entirely. Contact us if you need help determining which flange you need or if you just want to place an order.

How can Hells Gate Hot Rods help?

Hells Gate Hot Rods was built out of enthusiasm for Hot Rods and a necessity for quality, hard to find parts. We started our company because we could not find header flanges for a Buick Nailhead. It should not be that difficult to find the parts that you need for your dream build. We are seeking to help the do-it-yourself hot rodder who have always wanted to build their dream hot rod.

In addition to having many hard to find hot rod parts, we also offer manufacturing of custom parts. If you do not find the part that you are searching for, such as a specific header flange, we can custom build the flange that you need. Anything that you need we can help you with. We have a passion for building hot rods and want you to experience the satisfaction of creating your own hot rod.

We also offer additional services such as engineering design, part fabrication, private label manufacturing, TIG and MIG welding, and hot rod and custom car building. We are here to help you with all of your hot rod needs, from advice to hot rod parts. This should not be a frustrating or stressful process. Building your hot rod should be something that you dream about but not spend all your time looking for your hard to find hot rod parts.