Mopar Advance Spring Kit

The Mopar Advance Spring Kit by Mr. Gasket is a precision-engineered mechanical advance component designed for classic Mopar engines requiring restored or upgraded ignition timing control. As an experienced mechanic knows, the mechanical advance mechanism is critical to optimal engine performance—it automatically adjusts spark timing based on engine RPM, ensuring efficient combustion across the entire power band. This spring kit addresses wear, corrosion, or performance degradation in the centrifugal advance assembly, making it essential for anyone rebuilding a Mopar distributor or seeking to recover lost horsepower from an aging ignition system.

The mechanical advance springs control the rate at which the advance weights move, directly governing how quickly spark timing advances as RPM climbs. Over time, original springs lose tension or fracture, resulting in erratic timing curves and poor drivability. The Mopar Advance Spring Kit restores proper spring rate and tension, allowing the centrifugal advance mechanism to function as originally engineered. This pair of springs is manufactured to OEM specifications, ensuring compatibility with Mopar distributors and consistent performance characteristics that match factory timing curves for your specific engine application.

Enthusiasts and restoration specialists routinely install this spring kit during complete distributor overhauls, particularly on 340, 360, 440, and other classic Mopar V8 engines. The compact design (3.25 x 0.6 x 5.7 inches) fits seamlessly into standard Mopar distributor housings without modification. Whether you're rebuilding a muscle car, restoring a vintage truck, or tuning a street rod, restoring the mechanical advance mechanism with quality springs is one of the most cost-effective ways to improve throttle response, fuel economy, and overall engine behavior across a wider RPM range.