Advance Lockout Kit GM HEI Distributor

The Advance Lockout Kit GM HEI Distributor from FAST Electronics is a precision ignition control component designed for GM High Energy Ignition systems undergoing performance modifications. This kit is ideal for engine builders, hot rodders, and serious enthusiasts who require reliable spark timing control during aggressive tuning. It effectively prevents unwanted advance curve variations that can lead to detonation and inconsistent ignition behavior.

The Advance Lockout Kit functions by mechanically locking out the centrifugal and vacuum advance mechanisms within the distributor. This allows ignition timing to be controlled exclusively through external tuning sources, such as a standalone ECU or dedicated ignition controller. The design ensures zero mechanical drift or advance creep during sustained high-load operation, providing precise timing control across the entire RPM range.

Street cars, race engines, and performance street machines with GM HEI distributors benefit the most from this kit. It is particularly useful for those upgrading to a programmable ignition or running a carbureted big-block with custom timing requirements. The compact and lightweight design integrates directly into the distributor housing without requiring modifications to the engine bay.