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Adjustable Vacuum Advance Kit, GM Points Distributor

Adjustable Vacuum Advance Kit, GM Points Distributor

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Please note the following about this product:

  • This item is sold as a kit.


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What's in the Box


Adjusts GM points style distributors for any driving condition. Includes allen wrench and instructions. Easy to install.

Springs & cam plate not included (use 550-929 if needed).

  • Allows you to change the amount of ignition vacuum advance for maximum part-throttle performance while preventing the harmful effects of spark knock (detonation)
  • Dial in as much spark advance as conditions permit — add more advance under light load conditions to improve throttle response and fuel economy, or limit spark advance in high compression engines and high load conditions to eliminate knock
  • Built-in stop prevents the adjustment screw from "backing out" like other designs
  • Includes 3/32" Allen wrench and easy-to-follow instructions

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