Pertronix D9006 - Pertronix Adjustable Vacuum Advance

Pertronix #751-D9006Adjustable Vacuum Advance |
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Pertronix Adjustable Vacuum Advance for HEI replaces your OE non-adjustable unit. Allows you to change the amount of ignition vacuum advance for maximum performance while preventing detonation. Increases throttle response and horsepower while improving performance and fuel economy. Includes 3/32" Allen wrench and easy-to-follow instructions.
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