Listed is a set of (8) 3/8" Thick 304 Stainless Single Port Header Flanges For: Big Block Chevy MK IV V8 (396/454/598/632). 4.84" Bore Spacing, Conventional Bolt Pattern. Precision laser cut from 3/8" thick 304 stainless, our header flanges are manufactured in the U.S. and are machine surfaced.
