870 CFM Street Avenger - Aluminum Carburetor

Vacuum Secondaries and Manual Choke


PART# 0-85870

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Holley’s Street Avenger line of carburetors has a reputation for bolt-on-and-go performance. They have great features including a quick change vacuum secondary for easy fine tuning, optimized street calibrations, four vacuum ports for all vacuum accessories, built in fuel filter, and an included fuel line kit so you don’t have to make multiple trips back to the parts store to get your hot rod back on the road. These carbs share all of the same features that the Street Avenger series is known for, but now with a 36% savings in weight. Being aluminum also means they will hold their shine longer! Street Avengers are ready to run right out of the box, and now they are better than ever! Saving weight optimizes every aspect of performance of your car, whether it is acceleration, braking, or handling. What better place to start than the top of your engine?


  • Aluminum construction for maximum weight savings and long lasting shine
  • Optimized street calibration that works-out-of-the-box
  • Vacuum secondaries allow use on a wide variety of vehicles. Quick Change vacuum housing cap allows you to tune for performance or fuel economy (springs included)
  • Compatible with GM, Chrysler, and Ford A/T kickdown linkage. Additional parts may be required.
  • Fuel line kit included so there are no unnecessary trips back to the parts store
  • Limited lifetime warranty - Guaranteed to be free from defects in material and workmanship for the life of the product!
  • 100% wet-flow tested by Holley technicians to assure it arrives ready to run!
  • 36% weight savings


BoosterDown Leg
Emission Code3
Fuel InletDual
Primary Main Jet78
Primary Power Valve4.5
Primary Pump Nozzle Size42
Product TypeCarburetor
Secondary Main Jet82
Supercharged ApplicationNo
Throttle Bore1.750 inch
Vacuum Ports1 timed (spark) port, 2 full, and 1 PCV port
Part Number0-85870

Service Parts


This part is legal for use on Uncontrolled (Non-Emissions Controlled) Vehicles or Racing Vehicles.

The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles:

  • 1965 and older U.S. manufactured California Certified vehicles
  • 1967 and older U.S. manufactured Federally Certified vehicles
  • 1967 and older Foreign manufactured vehicle

Racing Vehicles are vehicles that are used exclusively for racing or other forms of competition that are not registered and that may never be used on the street.


    *Free Shipping & Handling only offered to the contiguous US on orders over $100.

    Some parts are not legal for use in California or other states with similar regulations.