A must have for circle track racers! Simply remove the vacuum canister from your HEI distributor, and replace it with this vacuum lockout. The lockout has a pin that holds the vacuum advance portion of the star wheel in place. Note: Not compatible with PROFORM Ford HEI Distributors. Product Features:Fits 1996 and Earlier GM HEI Distributors with a Clockwise RotationReplaces Vacuum Advance ChamberMade from High-Quality Plastic MaterialFeatures a Black Finish1-inch Stud Length
