These decals identified the carburetor unit that was used on Six Pack equipped Chrysler vehicles. They designated the Front, Center or Rear Carburetor applications. The Front and Rear decals were typically located on the top-flat area of the vacuum diaphragm pods. The Center decal was located on the body of the Center Carburetor below the upper lip of the unit (See original reference photos for positioning). The tow digit numeric code on the decal represents the last two digits in the part number assigned to the carburetor.