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49-877458-1

850 CFM Mighty Demon Carburetor Polished Aluminum Vacuum Secondaries

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$959.95 Each
Fitment
Club, 1953 thru 1959 View More
Product Details
Holley is proud to announce that the next generation of Mighty Demon™ carburetors have arrived. They are available in a full range of sizes and options for your street/strip car. They feature billet-aluminum metering blocks, billet aluminum baseplates, large capacity fuel bowls complete with dual sight glasses, dual threaded inlets on each side, and internal baffling to prevent fuel slosh when you are on the track. For high horsepower street and race engines, the aluminum Mighty Demon™ delivers more power and performance for your race car.
Availability: In stock
  • All aluminum polished construction with billet metering blocks and base plate (Now 40% lighter than the original Demons!)
  • Fuel bowls and main body have been redesigned for a sleeker, more stylish appearance
  • Completely re-engineered and re-calibrated for better drivability and full throttle performance
  • Re-designed throttle lever with integrated Ford A/T, 700-R4, and Chrysler kick down options
  • Fuel bowls now have dual threaded inlets on each side, dual sight glass windows, and internal baffling for improved fuel slosh control
  • Secondary fuel bowls include notched floats and jet extensions to prevent fuel starvation during hard launches
  • Changeable idle, high-speed air bleeds & power valve restrictions for precise tuning
  • Billet Baseplate with Idle-Eze™ allows precision fine tuning of the idle speed resulting in a smoother transition from off-idle

Holley is proud to announce that the next generation of Mighty Demon™ carburetors have arrived. They are available in a full range of sizes and options for your street/strip car. They feature billet-aluminum metering blocks, billet aluminum baseplates, large capacity fuel bowls complete with dual sight glasses, dual threaded inlets on each side, and internal baffling to prevent fuel slosh when you are on the track. For high horsepower street and race engines, the aluminum Mighty Demon™ delivers more power and performance for your race car.

850 CFM Mighty Demon Carburetor Polished Aluminum Vacuum Secondaries


Combined Cancer/Birth Defect
WARNING This product can expose you to chemicals including Chromium which is known to the State of California to cause cancer on birth defects or other reproductive harm. For more information, visit www.p65warnings.ca.gov
More Information
Base Part Number 877458
Brand Holley
Make / Model Series Body Notes Year
Make / Model Ford Club Series Body Notes Year 1953, 1954, 1955, 1956, 1957, 1958, 1959
Make / Model Ford Country Sedan Series Body Notes Year 1950, 1951, 1952, 1953, 1954, 1955, 1956, 1957, 1958, 1959
Make / Model Ford Country Squire Series Body Notes Year 1950, 1951, 1952, 1953, 1954, 1955, 1956, 1957, 1958, 1959
Make / Model Ford Courier Sedan Delivery Series Body Notes Year 1952, 1953, 1954, 1955, 1956, 1957, 1958, 1959
Make / Model Ford Crestline Series Body Notes Year 1950, 1951, 1952, 1953, 1954
Make / Model Ford Custom Series Body Notes Year 1949, 1950, 1951, 1952, 1957
Make / Model Ford Custom 300 Series Body Notes Year 1957, 1958, 1959
Make / Model Ford Customline Series Body Notes Year 1952, 1953, 1954, 1955, 1956
Make / Model Ford Del Rio Wagon Series Body Notes Year 1957, 1958
Make / Model Ford Deluxe Series Body Notes Year 1949, 1950, 1951
Make / Model Ford Fairlane Series Body Notes Year 1955, 1956, 1957, 1958, 1959
Make / Model Ford Galaxie Series Body Notes Year 1959
Make / Model Ford Mainline Series Body Notes Year 1952, 1953, 1954, 1955, 1956
Make / Model Ford Ranch Wagon Series Body Notes Year 1950, 1951, 1952, 1953, 1954, 1955, 1956, 1957, 1958, 1959
Make / Model Ford Ranchero Series Body Notes Year 1957, 1958, 1959
Make / Model Ford Skyliner Series Body Notes Year 1954, 1955, 1956, 1957, 1958, 1959
Make / Model Ford Sunliner Series Body Notes Year 1952, 1953, 1954, 1955, 1956, 1957, 1958, 1959
Make / Model Ford Victoria Series Body Notes Year 1951, 1952, 1953, 1954, 1955, 1956, 1957, 1958, 1959
Make / Model Mercury Colony Park Series Body Notes Year 1957, 1958, 1959
Make / Model Mercury Commuter Series Body Notes Year 1957, 1958, 1959
Make / Model Mercury Country Cruiser Series Body Notes Year 1959
Make / Model Mercury Custom Series Body Notes Year 1952, 1953, 1954, 1955, 1956
Make / Model Mercury M-47 Series Body Notes Year 1949, 1950
Make / Model Mercury Medalist Series Body Notes Year 1956, 1957, 1958
Make / Model Mercury Mercury Series Body Notes Year 1949, 1950, 1951, 1952
Make / Model Mercury Montclair Series Body Notes Year 1955, 1956, 1957, 1958, 1959
Make / Model Mercury Monterey Series Body Notes Year 1950, 1951, 1952, 1953, 1954, 1955, 1956, 1957, 1958, 1959
Make / Model Mercury Park Lane Series Body Notes Year 1958, 1959
Make / Model Mercury Turnpike Cruiser Series Body Notes Year 1957
Make / Model Mercury Voyager Series Body Notes Year 1957, 1958, 1959
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