Zinc-plated steel adapter kit that converts 9/16-18 and 5/8-18 power-steering rack ports to -6 AN connections for custom hose routing. Designed for late-model Mustang and Thunderbird racks from 1979–2004, these adapters include crush washers and Teflon O-rings for sealing against a flat, machined surface approximately .120 inch wide around each port. For racks equipped with internal inverted-flare cones, the crush washers and O-rings can be removed to allow proper seating. Made in the USA and ideal for clean, reliable AN plumbing on power-steering systems.