Moroso Adjustable Vacuum Advance Kits

Dial in spark advance with Moroso adjustable vacuum advance kits. They allow you to change the amount of ignition vacuum advance for maximum part-throttle performance while preventing harmful effects of detonation--spark knock. These kits can be adjusted as conditions permit; add more for improved throttle response and fuel economy under light loads or less for high loads and high compression engines to eliminate knock. Vacuum advance kits have a built-in stop to prevent the adjustment screw from "backing out" and include Allen wrench and easy-to-follow instructions for a no-hassle install. Get dialed-in for a better run with Moroso adjustable vacuum advance kits. Show Less