4500 Throttle Return Spring Kit - Clear

The CVR Performance 4500 Throttle Return Spring Kit in clear anodize is an essential upgrade for serious carburetor enthusiasts and engine builders who demand precise throttle response and fail-safe reliability. This kit addresses a critical mechanical vulnerability found in high-performance carburetors: the potential for throttle plates to stick or hang open under aggressive driving conditions.

By installing a dedicated return spring system, you restore redundancy to your throttle actuation, ensuring the throttle returns to idle immediately when you lift off the accelerator—regardless of fuel load, heat soak, or mechanical wear. The clear anodize finish on this kit provides both aesthetic appeal and functional corrosion resistance in under-hood environments. CVR Performance engineered the 4500 spring system specifically for four-barrel carburetors, where primary and secondary throttle plates must synchronize flawlessly during transition and wide-open throttle operation.

This throttle return spring kit is ideal for street rodders, muscle car restorers, and race-prepped vehicles running Holley, Edelbrock, or similar four-barrel carburetors. The return spring assembly is designed to maintain consistent tension across thousands of cycles without fatigue or relaxation. Its compact design—weighting only 0.31 pounds—mounts cleanly without adding unnecessary bulk, while the modular layout allows bolt-on installation without carburetor removal on most applications.