Rochester Carburetor Identification

Rochester Products Division of General Motors built carburetors from 1949 until the early 1990s:

• Model AA two-barrel for the Oldsmobile Rocket V-8, 1949-1950
• Model B one-barrel, 1950-1968
• Model BB two-barrel, 1951-1953
• Model 4G four-barrel, 1952-1967
• Model 2G two-barrel, 1955-1990
• Model H for the Corvair, 1960-1969
• Model 4M (Quadrajet), 1965-1990
• Model 2M (Dualjet), 1975-1987
• Model 2S (Varajet), 1979-1986