proflow header extractor flanges, for sb chevrolet, suit 1-3/4'' primary, 1.595'' x 1.427'', steel, 3/8 in. thick, each

Proflow offers a variety of header flange sizes and shapes to mate your heads and headers. These 3/8 thick flanges are precision-cut to meet your ports, reduce warping, and prevent leaks. Proflow header flanges keep your tubes in place without the big price tag.