Eliminate unwanted timing changes in your HEI distributor with this vacuum advance lockout. Designed for circle track racers and high-performance applications, it replaces the vacuum advance chamber and locks the advance mechanism in place.

• Fits GM HEI distributors (1996 and earlier, clockwise rotation)
• Replaces the vacuum advance canister
• Black finish, high-quality plastic construction
• Holds vacuum advance portion of star wheel securely in place
• Not compatible with PROFORM Ford HEI distributors
• Sold individually