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Product Summary

Universal Fit, 4-Barrel Carburetor Barrels, 500 CFM CFM

  • Annular Flow Boosters deliver near EFI-like drivability that you can feel as soon as you step on the gas
  • Fuel distribution is refined by eight equally spaced orifices in the booster rings that replace down-leg boosters which simply dump raw fuel into the venturi
  • Flat spots are completely eliminated, and throttle response in the low- to mid-RPM range is improved tremendously with no sacrificing of that top-end power that Edelbrock is known for
  • The AVS2 is unaffected by engine backfires since there are no power valves to blow out
  • For fast and simple part-throttle tuning, metering rods and springs can be changed in seconds without carburetor removal or fuel draining

Key Specs

Carburetor Barrels4-Barrel
Fuel TypeGasoline
CFM500 CFM
Carburetor Flange Type4-Barrel Square Bore
FinishSatin

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Details

Edelbrock's Annular Flow Booster technology brings superior fuel atomization to all dual-quad applications with the AVS2 500 CFM Carburetor #1903 that is specially calibrated for engines running two four-barrels.

  • Annular Flow Boosters deliver near EFI-like drivability that you can feel as soon as you step on the gas
  • Fuel distribution is refined by eight equally spaced orifices in the booster rings that replace down-leg boosters which simply dump raw fuel into the venturi
  • Flat spots are completely eliminated, and throttle response in the low- to mid-RPM range is improved tremendously with no sacrificing of that top-end power that Edelbrock is known for
  • The AVS2 is unaffected by engine backfires since there are no power valves to blow out.
  • For fast and simple part-throttle tuning, metering rods and springs can be changed in seconds without carburetor removal or fuel draining.
  • AVS2 carbs have the unique ability to "hold a tune" when compared to other carburetors
  • Your tuning and adjustments stay unchanged, so performance remains consistent
  • Updated primary and secondary booster clusters in the AVS2 offer the most accurate and up-to-date calibration available for today's fuels and octane levels
  • The unique Qwik-Tune Secondary Air Valve allows for limitless calibration of the secondary circuit
  • Adjustments can be with simple hand tools in seconds to suit your application
  • The AVS2 features a two-piece ease-of-tuning design that lets you make float level adjustments or replace internal components without draining the fuel from the carburetor or removing it from the engine
  • Satin finish
  • AVS2 Series is designed, manufactured, assembled and calibrated by Edelbrock in the USA

 

Edelbrock's Annular Flow Boosters brings superior fuel atomization to all dual-quad applications with the AVS2 500 CFM Carburetor #1903 specially calibrated for engines running two four-barrels. Single-carb AVS2 also available (1901/1902). For small-cubic-inch single carburetor engines, order the specially calibrated AVS2 500 CFM #1901 (electric choke) or #1902 (manual choke).

Charts

CARB Warning

For race/ off road use or for use on pre-1966 vehicles.

Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway, or if installed in vehicles model-year 1965 or older; motorcycles model-year 1977 or older; or off-highway recreational vehicles (such as off-road motorcycles and all-terrain vehicles) model-year 1996 and older. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.

Specifications

KEY SPECS
MFG. Part #1903
BrandEdelbrock
Carburetor Barrels4-Barrel
Fuel TypeGasoline
CFM500 CFM
Carburetor Flange Type4-Barrel Square Bore
FinishSatin
GENERAL
Choke TypeElectric
CFM Range500-599 CFM
Material TypeAluminum
Secondary TypeMechanical
Inlet Fitting3/8"
Gasket(s) IncludedYes
New or RemanufacturedNew
GTIN Code085347019038
Sold in QuantityEach