HEI III Performance Module (4 Pin)

The PERTRONIX IGNITION HEI III Performance Module (4 Pin) is a precision ignition control module engineered for classic General Motors vehicles from 1973 to 1989. This compact electronic component replaces the factory mechanical breaker-point distributor system with advanced solid-state switching technology, delivering reliable high-voltage ignition timing control. Enthusiasts and restorers depend on this module to restore engine performance while eliminating the maintenance headaches associated with point-and-condenser ignition systems.

Built by PERTRONIX, a leader in electronic ignition solutions, the HEI III Performance Module utilizes durable solid-state electronics to manage spark timing with precision that conventional mechanical systems cannot match. The 4-pin connector configuration integrates seamlessly with GM HEI III distributor housings, providing consistent dwell time and eliminating point wear and timing drift. This module's compact footprint (3.1 x 3.05 x 4.35 inches) allows installation within the distributor cap, keeping the ignition system completely stock in appearance while modernizing its reliability and efficiency.

Restoration shops, hot rod builders, and daily-driver owners benefit from this module's plug-and-play compatibility with original GM HEI III distributors used in Chevrolet, Pontiac, Oldsmobile, and Buick engines. Installation requires no special tools or ignition system modifications, making it an ideal upgrade for those preserving factory aesthetics while improving cold starts, fuel economy, and overall engine responsiveness. The lightweight design (0.13 lbs) ensures no adverse effects on distributor balance or engine bay weight distribution.