1986-93 5.0L Mustang, 1 5/8 chrome, unequal length, shorty headers This pair of BBK unequal length shorty headers are constructed of 14 gauge mandrel-bent tubing with 3/8 in. thick precision die stamed flanges. They feature 1 5/8 primary tubes which are unequal in length and come with a chrome finish. Add 8-15 more HP and great looks, too!