Idle Mixture Screw Set

The Idle Mixture Screw Set by Edelbrock is an essential tuning component for carburetor enthusiasts and engine builders working with Performer and Thunder AVS carburetors. These precision mixture screws are designed to replace worn or damaged originals, restoring your ability to achieve the perfect air-fuel ratio at idle and low-speed operation. Whether you're rebuilding a classic carb or fine-tuning a street engine, this pair gives you control over idle quality, throttle response, and fuel economy in a way fixed jets simply cannot match.

Manufactured from durable steel with a cadmium finish, these idle mixture screws are engineered to resist corrosion and wear while providing reliable, repeatable adjustments across countless tuning cycles. The cadmium plating protects against rust in high-heat carburetor environments while maintaining smooth, consistent thread engagement. Edelbrock's OEM-quality construction ensures precise machining tolerances, so each turn of the screw translates directly into measurable changes in idle mixture without binding or stripping. The compact design fits seamlessly into Performer and Thunder AVS carburetors, allowing you to dial in lean or rich conditions with confidence and accuracy.

This replacement set is ideal for rebuilds, repairs, or upgrades to any Edelbrock Performer or Thunder AVS equipped engine—from street rods and muscle cars to modified trucks and performance boats. If your existing screws are stuck, stripped, or missing, this pair restores full tuning capability without a complete carburetor swap. Proper idle mixture adjustment requires a functioning set of these screws, and Edelbrock's reputation for precision ensures that your tuning adjustments remain stable and repeatable throughout the break-in period and beyond.