This precision laser cut Chevy 348 - 409 header flange is cut from 3/8" thick 1018 cold rolled steel, our header flanges are manufactured in the U.S. and are machine surfaced. These header flanges are specifically made for the Chevy 348 - 409 head.
Port Size: 2.091"
We carry over 250 different header flange designs, so if you don't see the flange your looking for, talk with one of our tech reps about custom header flange cutting.
Flanges Sold Separately
