Click on image to zoom

5563020BT - Demon Carburetion 850 CFM Mighty Demon Annular Carburetor-Blow Through

Annular Discharge Boosters. Blow Through Design.

Pricing: $713.95


Demon Carburetion - Mighty Demon Annular Carburetor P/N 5563020BT Features:

  • Billet Baseplate w/Idle-Eze
  • Billet Metering Blocks
  • No Choke Horn
  • Replaceable Air Bleeds/Idle Feed Restrictors
  • Mechanical Secondaries
  • Patented Large View Sight Windows
  • Dual Inlets
  • Metering Blocks w/Tunable Jets
  • 4 Corner Idle Adjustability
  • Built-In Power Valve Blow Out Protection
  • Vacuum Ports
  • Most Common Tuning Parts Interchange From Other Manufacturers
  • Clear Dichromate finish for good looks and corrosion protection. Designed for well-prepared 425 - 540 cid engines. Calibrated to work with turbocharged and centrifically supercharged applications. Contoured venturii inlet offers balanced airflow for increased horsepower. Mechanical secondaries for awesome tire turning performance. Dual accelerator pumps for additional fuel under initial acceleration. Screw in air bleeds for precision tuning capabilities. Screw in idle feed restrictors for precise idle tunability. Billet Metering Blocks for exceptional fuel metering capacity. 4 corner idle allows you to precisely control your idle system. Billet Baseplate with Idle-Eze™ allows precision fine tuning of the idle speed resulting in a smoother transition from off-idle. Large capacity float bowls eliminates fuel starvation. Large glass float-level sight windows for easy and safe fuel level adjustments. Dual feed fuel inlets for constant high volume fuel delivery. “Quik Release” non-stick gaskets for easy jet changes.


Holley® has been manufacturing fuel systems of all shapes and sizes since 1903. In fact, over 250,000,000 carburetors have been produced over the years for everything from Henry Ford’s original Model A to the baddest factory muscle cars ever to roll out of Detroit. Did you know that Holley supplied over half the carburetors in WWII including not just automobiles, but PT Boats and airplanes? It’s true. No company knows fuel systems like Holley. Today, Holley carburetors continue to be a dominant force in high performance and racing, winning more races than all others combined. Holley carbs have powered every NASCAR Sprint Cup Series™ team and nearly every winning NHRA® Pro Stock team since the 1960s and every weekend still today.


  • 5563020BT
  • 5563020BT
  • 792898307452
  • Demon Carburetion
  • New

Shipping Information

  • Item Requires Shipping
  • 13.0 lbs.
  • W11.0000” x H7.5000” x L12.2500”

Customer Reviews

Comment Total Reviews (0)

Write the First Review!

You must login to post a review.

  • We don’t just want your business today. We want to EARN your business for LIFE!
  • USA Owned, Operated & Employed
  • Installers & Resellers Click Here to Apply
  • We Specialize In:
    • GM LS Conversions
    • Engine & Trans Combo Kits
    • Unique Ready to Run Engines
  • Have a question?
  • 888-748-4655 Mon-Fri 8AM-6PM EST
  • Click above for 24/7 Live Chat Service.