Throttle Springs - 3.750 Long - Medium Tension

The PAC Racing Springs Throttle Springs – 3.750 Long – Medium Tension (PAC-3005) is a precision throttle return spring engineered for high-performance engine management systems. This steel spring delivers the medium tension required for consistent throttle cable actuation, ensuring predictable pedal response and reliable engine control under demanding operating conditions. PAC Racing Springs manufactures OEM-quality components for automotive applications where spring response directly impacts drivability and safety.

The 3.750-inch free length specification positions this spring within the mid-range compression envelope common to carbureted and fuel-injected engine platforms from the 1960s through modern aftermarket builds. Medium tension rating prevents over-stiffness that can cause sluggish pedal return or binding, while maintaining sufficient spring force to overcome cable friction and friction losses in the throttle linkage. The natural steel finish indicates a bare, uncoated construction suitable for dry engine compartment mounting away from direct moisture exposure. This spring is supplied as a single unit, allowing technicians to replace worn or fatigued springs without purchasing unnecessary multiples.

Engine builders, restoration specialists, and performance tuners rely on PAC throttle return springs during carburetor rebuilds, linkage overhauls, and throttle cable replacements. Worn or missing return springs result in sluggish throttle response, stalling risk, or dangerous throttle hang—conditions that compromise both performance and safety. This 3.750-inch medium-tension spring addresses those failure modes, restoring the snap and reliability of the throttle system. Verify fitment against your specific carburetor model and engine platform before ordering, as throttle spring specifications vary significantly across applications.