.028in- 6-32 Screw-in Restrictors (4pk)

The .028in- 6-32 Screw-in Restrictors (4pk) from Quick Fuel Technology are precision calibration jets designed for fine-tuning carburetor fuel delivery on street, strip, and race engines. These brass emulsion jets are essential when you need to lean out or adjust fuel mixture without replacing entire carburetor circuits—a common requirement when upgrading ignition systems, intake manifolds, or running different fuel blends. Anyone who's dialed in a carbureted engine knows that small changes in jet sizing dramatically affect throttle response, fuel economy, and peak horsepower.

Manufactured from durable brass and threaded to the industry-standard 6-32 specification, these .028-inch restrictors screw directly into compatible Quick Fuel carburetors' emulsion tube passages. The .028-inch orifice diameter determines fuel atomization and mixture ratio—smaller than standard jets, these are ideal for high-rpm applications, lighter engine loads, or when correcting rich conditions without full carb swaps. Each four-pack ensures you have spares for testing different calibrations or maintaining multiple carburetors. Installation requires only basic hand tools and takes minutes per jet.

Carburetor tuners, vintage hot-rodders, and performance mechanics rely on these restrictors to optimize fuel delivery on 283s, 350s, 427s, and small-block builds where precision jetting unlocks power. They're equally valuable for restorers matching original Quick Fuel carb specs or troubleshooting lean-surge issues on idle circuits. Verify your carburetor accepts 6-32 threaded emulsion jets before ordering—Quick Fuel Alcohol, Street Warrior, and competition carbs are fully compatible. This four-pack is your plug-and-play solution for mixture adjustments without complete carburetor rebuilds.