Proflow offers a variety of header flange sizes and shapes to mate your heads and headers. These 3/8 thick flanges are precision-cut to meet your ports, reduce warping, and prevent leaks. Proflow header flanges keep your tubes in place without the big price tag.
No more struggling to get  bolts started on 1 3/4" primary pipes with the std Windsor bolt pattern. If you have aftermarket heads with the wider 3" bolt spacing why not take advantage of that option and start your header build project with the much more convenient bolt hole position.
You will end up being rewarded with a better set of pipes and also be able to fit and remove them with ease.

Proflow graphite laminated stainless steel gaskets offer superior sealing capabilities, are non stick, comfortable with high temp  and pretty much the best choice to use for sealing your pipes. They do not require any sealant and in most cases are useable

Note: Gasket to suit PFEEHPFD1. Similar  to Felpro 1487 but with only the dedicated wide bolt pattern