1979-93 Mustang, 1979-86 Capri, and other Fox-body vehicles with 351W, steel, chrome plated, 1 5/8 in. diameter, engine swap, shorty headers Take the hassle out of your 351W swap. Easily pump some extra cubes and horspower into your car with these engine swap headers from BBK. These 1 5/8 in. shorty headers will allow you install a 351W into your Fox-bodied Ford. Constructed from heavy 14-gauge mandrel-bent tubing with 3/8 in. thick die-stamped flanges, the headers come with a durable chrome plated finish.