Pro-Series Carburetor Kits When you want to fully restore your AED or Holley Carburetor to it's original look and quality the "Pro-Series" carburetor kits are the answer. They include all the great components of our famous "Ultimate Performance Carburetor Kits" plus the additional hardware that corrodes, wears out, and plain just looks miserable over time. Also Includes New Reusable Bowl and Metering Gaskets ! Listed are some of the special features includedThe original "Ultimate Performance carburetor Kit"New bowl screws and pump nozzle screws. New pump cover and throttle plate screws. Needle and seat nuts and screws. Baseplate screws and idle mixture screws. Idle speed position screw and idle speed spring. Sight plug screws and secondary connecting link. Miscellaneous clips, pins, and hardware.Pit Stop USA offers AED Pro Series Carburetor Kit - For 350-500 CFM Holley Carburetors 23001 at low everyday prices. Be sure to check out all of our products from AED - Advanced Engine Design including AED Rebuild Kits.