Pigtail HEI Battery/Tach Lead

The ACCEL Pigtail HEI Battery/Tach Lead is a dedicated ignition wiring harness connector designed for General Motors HEI (High Energy Ignition) distributor systems. This connector bridges the critical power and tachometer signal pathways between the HEI distributor and the vehicle's electrical system, ensuring reliable spark delivery and accurate engine monitoring on classic and performance GM vehicles.

HEI systems require dual-function connectors to handle both heavy battery current (for the ignition coil) and the low-voltage tachometer signal simultaneously. The pigtail configuration allows clean separation of these circuits at the source, reducing electromagnetic interference and noise that can corrupt tach readings or cause ignition inconsistencies. This design is particularly important in vehicles with aftermarket electrical modifications, upgraded alternators, or high-output ignition systems where signal integrity directly impacts driveability.

Builders and restorers working with GM engines benefit from having a direct-fit HEI harness connector on hand when diagnosing electrical gremlins, upgrading to higher-output distributors, or transitioning between original and performance ignition equipment. The pigtail harness simplifies rewiring tasks and eliminates the need to fabricate custom connections. ACCEL's connector is manufactured to OEM specifications, ensuring compatibility across a wide range of GM applications from 1970s-era engines through modern classic car restorations.