JEGS Performance Products 40003 - JEGS Adjustable Vacuum Advance for HEI
JEGS Performance Products#555-40003Adjustable Vacuum Advance |
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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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