Bill Smith
Founder, 1929-2014
Speedy Bill
Since 1952
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America's Oldest Speed Shop ®


Chrome HEI Wire Retainer Cap

SAME DAY SHIPPING! Most orders ship within 24 hours.

Overall Height:
Sold in Quantity:
Cap Terminal Style:
HEI / Male
Overall Diameter:
Inside Diameter:
Chrome HEI Wire Retainer Cap

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Q & A

What's in the Box

Available in chrome only.

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Adjustable Vacuum Advance Kit, GM HEI Distributor
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Adjust your GM HEI distributor for any driving condition. This kit 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
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287-99600 Instructions (PDF)

HEI Advance Curve Kit
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                        Modifies any GM HEI distributor with either clockwise or counterclockwise rotation and offers plenty of curve possibilities.  Center plate eliminates overcentering of centrifugal weights.  Comes complete with detailed instructions. 

NOTE: Installation of this kit may alter emission levels.

550-929 Instructions (PDF) 

Vacuum Advance Cover
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