New old stock. Still unused and like new in the box, With minor marks and blemishes. Pictures show Exact item and condition. 

The items we sell are as is. Please look at all the photos they show exact item for sale. I do my best to list items accurately but I am human and may miss something. We are a small shop so it is hard to take returns. But if an item is defective beyond what is described I will do my best to make it right. 

I have this in stock and ready to ship out. I usually send items out the next business day. I will pack with care to assure the item gets delivered safely. Thanks for looking!

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DEMON

850 CFM ROAD DEMON CARBURETOR

Mechanical Secondaries Down-Leg

Part # RDA-850-MS

All new for Demon, the new aluminum Road Demon carburetors are showing a new lighter, sleeker look and calibrated for Street Rods and mildly modified Street Machines and light trucks, the Road Demon™ is an impressive performer. With a remarkably smooth choke tower design and patented air entries, the Road Demon™ offers extremely smooth operation with strong throttle response. The Road Demon™ has the standard Demon carburetor features: Cast metering-blocks with adjustable jets and four-corner idle, plus large capacity fuel bowls with patented sight glasses for tuning ease. Available in 650-850 cfm models, the Road Demon™ is perfect for all engine sizes. The Road Demon™ targets mild performance engines from 302 to 460 cid, and rated at 250-500 horsepower. Road Demons come in mechanical and vacuum secondary models which makes them ideal for daily drivers as well as weekend cruising for a wide range of vehicles

Features:

  • All aluminum polished construction with die-cast 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
  • Changeable idle, high-speed air bleeds & power valve restrictions for precise tuning
  • New simple part numbering system: Start with RDA (Road Demon) Add the carburetor cfm size (650, 750, or 850) and then add the model suffix; MS (Mechanical Secondaries); VS (Vacuum Secondaries); AN (Annular Discharge Boosters)

About Demon

Demon carburetors have it all – classic modular performance with a modern look, killer features, and numerous models for countless applications. When you pop the hood on your hot rod, a Demon carburetor will separate you from the pack.

Barrels4
Billet ColorShiny
BoosterDown Leg
BrandDemon
Carburetor UseStreet
CFM850
ChokeElectric
Circuit2
Clearance CategoryCarburetors and Components
ConditionNew
Emission Code3
FinishShiny
FuelGasoline
Fuel InletDual
Fuel SystemCarbureted
High Speed Air Bleed33
Idle Air Bleed Size73
Marine UseNo
MaterialAluminum
ModelRoad Demon
Primary Main Jet76
Primary Power Valve6.5
Primary Pump Nozzle Size33;33
Product TypeCarburetor
SecondariesMechanical
Secondary Main Jet84
Supercharged ApplicationNo
Throttle Bore1.75
WarrantyLimited 
UPC792898400894
Part NumberRDA-850-MS