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JEGS Performance Products 40003 - JEGS Adjustable Vacuum Advance for HEI

JEGS Performance Products 40003 - JEGS Adjustable Vacuum Advance for HEI

JEGS Performance Products#555-40003

Adjustable Vacuum Advance
  • For GM V8 HEI

    JEGS Performance Products 40003 - JEGS Adjustable Vacuum Advance for HEI

    JEGS Adjustable Vacuum Advance for HEI replaces the OE non-adjustable unit. Allows you to change the amount of ignition vacuum advance for maximum performance while preventing detonation. Improves fuel economy, throttle response, horsepower, and performance. Includes 3/32" Allen wrench and easy-to-follow instructions.

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