These are the full lenGTh headers you have been waiting for. These are "Tri-y' design headers that are made to fit your Ranchero, Falcon, Fairlane, or Comet perfectly. These feature a 2 1/2" Collector and 1 5/8" Primary tube diameter. These were designed by racing legend and header designer doug thorley. The absolute best quality, best fitting header available. Important note: these were designed to fit stock v-8 cars. If you have swapped your motor, make sure your engine compartment configuration matches the original v-8 setup for proper clearance. Made in the usa.