Cadillac 331-390-429 V8 Mild Steel Header Flange

Cadillac 331-390-429 V8 Mild Steel Header Flange

Precision laser cut form 3/8" thick Mild Steel, our header flanges are manufactured in the U.S. and are machine surfaced. These header flanges are specifically made for the first OHV Cadillac V8 engines, these had displacements of 331, 365, 390, or 429. This flange has a siamese center port to match the Cadillac 429 cylinder head.

Outer Ports: 1.76" x 1.37", 1 7/8" Port Size

Center Port: 1.8" x 1.6", 2" Port Size.

We carry over 450 different header flange designs, so if you don't see the flange you're looking for, talk with one our tech reps about custom header flange cutting. Flanges sold separately.