This air scoop is fabricated our of aluminum and hand polished to a brilliant finish. It will fit Holley or Quadrajet standard four barrel carburetors with a 5 1/8" air inlet. The scoop is 6" tall x 10" wide x 16" long and requires the use of a flame arrestor (8" x 3" or smaller) to hold it in place and to meet US Coast Guard requirements.