Throttle Springs - 2.500 Long - Heavy Tension

The Throttle Springs - 2.500 Long - Heavy Tension by PAC Racing Springs represent precision engineering for carburetors and throttle linkage systems that demand reliable, consistent spring return force. These heavy-duty springs are engineered for high-performance fuel delivery systems where weak or fatigued OEM springs fail to maintain crisp throttle response under load. Whether you're building a competition carb setup, restoring a classic muscle car, or upgrading a street engine, proper spring tension directly affects drivability, fuel atomization, and engine control during acceleration.

Manufactured to strict tolerances by PAC Racing Springs—a trusted name in performance valve train components—these throttle springs deliver unwavering return force across the full range of throttle opening. The 2.500-inch length and heavy-tension rate ensure that your carburetor butterfly valves snap shut decisively when you release the throttle, eliminating hanging idle conditions and bogging that plague aging or modified carburetors. The compact 0.5-inch body diameter allows easy installation in tight carburetor mounting points while the minimal 0.02 lbs weight places zero additional strain on your linkage hardware or engine components.

Performance enthusiasts, engine builders, and carburetor specialists rely on PAC Racing Springs for Holley, Edelbrock, Carter, and other popular carb platforms where OEM springs wear out or insufficient tension degrades throttle control. Heavy-tension springs like these are essential when upgrading to larger-displacement engines, installing aggressive cam profiles, or tuning for maximum fuel control in autocross and road-course applications. Installation is straightforward on most single- and four-barrel carburetors; ensure compatibility with your specific carburetor model and linkage geometry before ordering.