1.75" 351W swap hdr 79-93 Pump some extra cubes and horsepower into your car the easy way with these engine swap headers from BBK. Features include 1 5/8 in. or 1 3/4 in. primaries in full length and shorty designs. They're constructed from 14-gauge, mandrel-bent tubing with 3/8 in. thick die-stamped flanges, and are available inchrome plated finishes. Gaskets and mounting hardware are included.