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 stock small block chevy 5.7L LT1 heads. Many aftermarket heads may also utilize the stock small block Chevy bolt pattern.
Port Size: Round Port 1 5/8"
We carry over 250 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.
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