condgreemee 1406 600 CFM AFB-style 4‑Barrel Carburetor 4B Square Bore with Electric Choke, Two‑Step Metering

The Condgreemee 1406 is a 600 CFM AFB-style 4-barrel square-bore carburetor built as a direct replacement for Performer-style manifolds and equipped with an electric choke for easier cold starts.

This high-flow carburetor is engineered to replace worn or damaged 600 CFM Performer-style units on classic V8 applications, offering a balance of drivability and tuning flexibility. It features two-step metering rods to smooth transitions between fuel circuits, a bottom-feed primary venturi booster for stronger throttle response, and non-adjustable electric secondary air valves for reliable operation. Constructed with durable materials and supplied fully assembled, it arrives ready for installation on compatible intake manifolds.

What vehicles and manifolds will this 1406 carburetor fit?

The Condgreemee 1406 is designed for square-bore applications using Performer-style intakes. It is commonly used on classic Chevrolet, Ford and GM small- and big-block V8 engines when the intake accepts a 4-barrel AFB-style flange.

• Fits Performer, Performer EPS, Performer RPM, RPM Air-Gap, Torker II and similar manifolds
• Compatible with many Silverado, Corvette, Mustang, Mercury and GMC trucks using non-computered engines
• Not for use on vehicles with computer-controlled fuel systems or later Q-Jet GM systems
• Not compatible with 1981-and-later GM computers or AOD automatic overdrive-equipped models

How does the two-step metering rod design affect drivability?

The internal two-step metering rods allow staged fuel enrichment from idle through cruise to wide-open throttle, helping prevent abrupt transitions and backfires during circuit change. This improves throttle modulation and reduces the risk of over-stressing the power valve circuit.

• Two-step metering rods smooth the handoff between idle/main circuits
• Removable rods permit future tuning to match engine needs
• Bottom-feed primary booster supports better mid-range acceleration
• Non-adjustable electric secondary valves provide predictable opening

What should I know about installation and setup?

The carburetor ships fully assembled but does not include printed installation instructions. For a correct installation, confirm manifold bolt pattern and throttle/return linkage geometry, then follow step-by-step setup videos or manuals appropriate to your engine and intake.

• Comes ready to install; gaskets and linkage hardware may not be included
• Requires carburetor-specific jetting/tuning to match cam, compression and intake
• Electric choke requires a 12V feed with ignition-switched power and proper heat sensing
• Not suitable for computer-controlled fuel injection or later GM Q-Jet applications

What performance and durability features are built into this replacement carb?

Engineered as a quality aftermarket replacement, this Condgreemee carburetor uses robust components intended to withstand typical street and light-performance use. The assembly is designed to restore proper fuel delivery, improve idle quality and give dependable throttle response when matched to the engine's requirements.

• High-grade materials in body and linkages for corrosion resistance and longevity
• Electric choke for easier starting in cooler conditions
• Primary booster and calibrated metering for improved acceleration feel
• Supplied as shown in photos; installation instructions not included

Who is this for: The Condgreemee 1406 600 CFM carburetor is intended for owners restoring or upgrading classic V8 engines that use Performer-style 4-barrel square-bore intakes and who want a ready-to-install aftermarket replacement with electric choke. It’s ideal for street drivers, restorers and mild performance builds that are not controlled by an engine computer. If your vehicle uses computer-controlled injection or late-model Q-Jet systems, choose a compatible fuel system instead.