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.

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This new Header plate is designed to fit primarily cast iron and aluminium aftermarket style heads with a 5/8″spark plug. This design allows  for the plate to be reversed for best orientation with your exhaust port. Will not fit 13/16 socket early iron heads unless plates are cut to build individual primary pipes that can then slide into a merge collector for easy fitting

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