Adjustable Vacuum Advance Kit Fits: 1975-'81 GM HEI Distributors
Features- Allows you to change the amount of ignition vacuum advance for maximum part-throttle performance while preventing 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
- Perfect companion to Moroso HEI Advance Curve Kit No. 72300
Emissions Warning
Products sold on this website may not be legal for use on public roads or highways due to Environmental Protection Agency (EPA) restrictions or California Air Resources Board (CARB) emissions regulations. Federal and State regulations may restrict Product installation to pre-emissions regulation (Model Year 1974 or earlier) or to competition/racing vehicles used exclusively in
1) events organized by recognized bodies, authorizing permits for participating drivers.
2) racing event qualification, and3) practice associated with events.
Installation of such products, including driving racing vehicles to and from the track, may be considered illegal “tampering ” or as “defeat device”, and may result in federal and state penalties. It is the purchaser’s responsibility to ensure compliance with all applicable emissions laws, including California’s stricter standards.
Proposition 65 Warning:
This product may contain chemicals known to the state of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.
- Advance Weights Included:
- No
- Advance Limit Bushings Included:
- No
- Adjustable Vacuum Advance Included:
- Yes
- Quantity:
- Sold as a kit.
- Notes:
- Designed for 1975-81 GM style H.E.I. distributors.
