Description
A worn or unreliable ignition module directly compromises engine timing and spark consistency, killing your performance gains and reliability on the track or street. The Proform 66944C replaces the factory GM HEI module with a high-performance alternative that delivers precise spark control and improved dwell characteristics for sustained RPM stability. If you’re running a classic small-block or big-block Chevy and demand predictable ignition behavior under load, this is a direct bolt-in upgrade.
- GM HEI 4-pin connector
- Fits 1974-1988 models
- High-performance control module
- Improved dwell consistency
- Enhanced spark timing stability
- Bolt-on installation
- OEM replacement design
- Single unit
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