Edelbrock 1903 AVS2 Series Dual-Quad Carb,500 CFM,Electric Choke

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

 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). 

Installation Instructions (PDF)