These swap headers allow enthusiasts to drop an LS (all exc. LS7) engine into the ever popular 1955-1957 Chevy. These new headers were designed to fit with a stock gear box or Saginaw 605 gear box only. If using a unisteer rack system, see part # 2293-1HKR. They are a true 1 ¾” long tube design to sufficiently maximize the torque and horsepower of the free breathing LS engines. They are available in high temp black paint, silver ceramic or Hooker’s brand new “Darkside” black ceramic.