The Edelbrock AVS2 Series No. 19063 is a black-finished carburetor with electric choke that is designed and calibrated for optimum street performance in engines that require 650 CFM of air-fuel flow. The AVS2 is a perfect replacement or upgrade that features annular flow primary boosters with a new calibration for improved off-idle and cruising performance. The annular flow booster design delivers improved fuel atomization to eliminate flat spots that may be encountered as the carburetor transitions from idle to full throttle. Each annular flow booster features eight equally spaced orifices to improve fuel metering from idle to the main circuit. The improved flow metering makes this carburetor ideal for use with a wide variety of small- and big-block engines with either dual- or single-plane intake manifolds. The Edelbrock AVS2 No. 19063 includes both timed and full vacuum ports for ignition advance. It comes with: .101 primary and.098 secondary metering jets.