Generic 1906 4-Barrel Carburetor 650 CFM Satin Finish — Electric Choke, Annular Flow Booster

This replacement carburetor is a direct-fit option for vehicles using the 1906 AVS2 Series 650 CFM 4-barrel square-bore setup. Crafted from lightweight die-cast aluminum and fitted with an electric choke, it aims to deliver stable idle behavior, better throttle responsiveness, and reliable operation under heat and pressure. The unit ships pre-tested and includes the gaskets and hardware needed for installation.

What does this carburetor replace and which engines is it compatible with?

It’s designed as a replacement for the 1906 AVS2 650 CFM 4-barrel carburetor with a square-flange mounting pattern. Use this unit where the original Edelbrock AVS2 650 CFM square-bore carburetor is specified or when the inlet and flange dimensions match.

• Fits 4-barrel square-flange 650 CFM AVS2 applications
• Dual fuel inlet ports for common fuel line arrangements
• Pre-calibrated for typical street and light performance use
• Check flange bolt pattern and throttle linkage for fitment

How does the electric choke affect starting and warm-up?

The factory-style electric choke simplifies cold starts by automatically enriching the mixture until the engine warms. It removes the need for manual choke adjustments, smoothing transitions from cold idle to normal operation while reducing stalling risk during warm-up.

• Automatic operation wired to ignition power for consistent warm-up
• Reduces manual choke adjustments and associated errors
• Helps maintain steady idle during temperature changes
• Requires proper wiring and adjustment for optimal performance

What performance and build features improve throttle response and durability?

The carburetor uses an annular flow booster design and calibrated metering to promote smoother throttle transitions and predictable power delivery. Lightweight die-cast aluminum construction improves heat resistance and reduces distortion compared with cheaper materials.

• 650 CFM rating balances airflow for many street V8s and mild builds
• Annular flow boosters for better fuel atomization under load
• Die-cast aluminum body resists warping at high temperatures
• Pre-tested units and included hardware simplify serviceability

What comes in the box and how easy is installation?

The package includes the carburetor plus the gaskets and mounting hardware needed for a straightforward swap. Because the unit is pre-tested and comes with clear mounting hardware, most installations are manageable for home mechanics familiar with carb swaps.

• Complete gasket set and mounting bolts included
• Pre-calibrated settings for common street usage
• Simple throttle and choke linkage connections required
• Manufacturer support available for fitment questions

Who is this for: This carburetor is intended for enthusiasts, restorers, and DIY mechanics replacing or upgrading a 650 CFM square-bore AVS2 carburetor on street-driven V8s and light-performance builds. Choose this unit if you need a direct-fit replacement with an electric choke, durable aluminum construction, and pre-tested components for reliable daily or weekend driving.