Allstar Performance GM HEI Advance Curve Kit ALL81300

Precise ignition timing is the foundation of consistent, repeatable performance—and the Allstar Performance GM HEI Advance Curve Kit gives you direct control over your engine's mechanical advance curve. Whether you're tuning for a naturally aspirated stroker or optimizing a carbureted competition engine, this kit lets you dial in the exact advance curve your combination demands. By swapping bushings, weights, and springs, you can tailor ignition timing across the RPM range without expensive custom distributors or complex electronics.

• Mechanical advance control
• Three spring sets included
• Adjustable weights and bushings
• GM HEI V8 compatible
• Bolt-on installation
• Precision-tuned performance
• Carbureted engine optimized