S/S Needle & Seat - .150

The S/S Needle & Seat - .150 from Quick Fuel Technology is a stainless steel fuel delivery component engineered for carburetors requiring precision float bowl regulation. Designed for use in Holley and Quick Fuel carburetors, this adjustable needle and seat assembly controls fuel flow into the bowl with microscopic accuracy, making it essential for builders tuning fuel-injected conversions, high-performance street engines, or vintage carburetor restorations. A properly functioning needle and seat prevents flooding, vapor lock, and inconsistent jetting—problems that plague poorly maintained or worn fuel systems.

This stainless steel needle and seat features a 0.150-inch orifice diameter, the standard size for mid-range carburetors running fuel volumes between 30–60 GPH. The adjustable design allows tuners to fine-tune fuel inlet pressure and float height without replacing the entire inlet system, critical when dialing in air-fuel ratios on multi-carb setups or when upgrading fuel pumps. Stainless construction resists corrosion from ethanol-blended fuels and provides superior durability compared to brass alternatives, extending service intervals on both street and competition engines.

Carburetor enthusiasts, engine builders, and restoration shops benefit most from this component when servicing fuel delivery on vintage muscle cars, hot rods, or performance builds where precise fuel metering directly impacts throttle response and part-throttle drivability. Installation is straightforward: remove the fuel inlet fitting, replace the worn needle and seat, and reset float level according to manufacturer specifications. Compatible with Quick Fuel Technology and Holley carburetors using standard 0.150-inch inlet valves, this part delivers repeatable results whether you're tuning a street engine or chasing consistency on the dyno.