TTi Header Flanges, 3/8", 1.995 X 1.550 square ports
Fits Cylinder Heads: OEM, B1BS Sportsman, Brodix B1BS, Bulldog, Edelbrock E-Street, Edelbrock Performer RPM, Edelbrock Victor, Indy-EZ, Indy-440SR, Indy-440-1, Koffel's Original B1, Procomp, Stage5, Stage6, 440-Source, Factory 915 or 452