AMC 360/390/401 Rect. Port Mild Steel Header Flange

Precision laser cut from 3/8" thick mild steel, our header flanges are manufactured in the U.S.A. and are machine surface. These header flanges are designed for the 304-401 C.I. AMC V8 engines with the square/rectangular port heads.

Port Size: 1 3/4" or 1 7/8" available

Preformed stubs are 2"-3" long, and have one end perfectly formed to the port shape of the flange, drastically decreasing your overall design and build time.

We carry over 450 different flange designs, if you don't see something you need, or for any questions, give one of our specialists a call at 1-800-290-3920. Custom flange designs and one-off laser cutting on header flanges is also available.