Edelbrock Thunder Series AVS Dual Quad Annular Boosters 500 CFM Carburetor w/Manual Choke

If you're setting up a dual-quad setup on your engine, this Edelbrock Thunder Series AVS carburetor is built to make that pairing work exceptionally well. This is the 500 CFM model with a manual choke, specifically calibrated for applications running two four-barrel carburetors. Edelbrock's Annular Flow Booster technology is a key feature here. Unlike older down-leg boosters that just dump fuel into the venturi, these boosters have eight small holes arranged in a ring. This design refines fuel distribution and atomization, giving you a much smoother fuel delivery that feels almost like modern EFI. You'll notice a big difference in how the engine responds, especially in the low to mid-RPM range, with flat spots completely eliminated. And don't worry about sacrificing top-end power; this carb is designed to keep that strong performance going.

One of the practical benefits of the AVS2 design is its resilience. It doesn't have power valves that can blow out during engine backfires, making it more robust. Tuning is also made much simpler. You can change metering rods and springs in just a few seconds without having to remove the carburetor or drain the fuel. Edelbrock carburetors are known for holding their tune, meaning your adjustments stay put, leading to consistent performance over time. The booster clusters have been updated to work well with today's fuels and octane levels. Plus, the secondary air valve system, called Qwik-Tune, lets you easily adjust the secondary circuit with simple hand tools to match your specific engine setup. The two-piece design also makes it easy to access internal components or adjust float levels without removing the carb.

This carburetor is manufactured, assembled, and calibrated by Edelbrock in the USA. Please note that this carburetor is not CARB approved and cannot be shipped to California. If you're looking for a reliable and tunable dual-quad carburetor that offers improved drivability, this Edelbrock AVS2 is a solid option.