Standard Ignition Distributor Vacuum Advance P/N:VC-181

Help your distributor advance ignition timing the way it was designed with the Standard Ignition distributor vacuum advance VC-181, a distributor vacuum advance control for classic Chevrolet, GMC, Jeep, American Motors, Oldsmobile and Pontiac applications. It is a direct-fit replacement for the listed applications, including the 1969-1970 and 1973-1974 Chevrolet Camaro, 1966-1968 and 1972-1974 Chevrolet Corvette, 1973-1974 GMC Jimmy, 1972-1974 Jeep Wagoneer, 1971-1974 American Motors Ambassador and 1967 Pontiac GTO.

• Ignition specialist since 1919: Standard Ignition has served the automotive aftermarket since 1919 and focuses on quality and broad coverage for ignition needs.
• Controlled manufacturing: As a global maker of original equipment ignition products, Standard keeps full quality control over the process, from individual components through the finished unit.
• Precision calibrated: Calibrated for correct ignition advance.
• Leak tested: Units are tested at 30HG maximum vacuum to ensure they do not leak.

A vacuum advance unit mounts on the distributor and uses engine vacuum acting on an internal diaphragm to add ignition timing advance at light load and cruise. As vacuum falls under heavier throttle, the vacuum-driven portion of the advance drops away. Signs this part may need replacing include a torn or leaking diaphragm, hesitation or flat response at part throttle, reduced fuel economy, or a vacuum leak at the unit. Diagnose the cause first, since other ignition and vacuum faults can produce the same symptoms.

VC-181 is listed for 85 applications, including the 1968-1970 and 1973-1974 Chevrolet C10 Pickup, 1965-1969 and 1973-1974 Chevrolet Impala, 1973-1974 Chevrolet Blazer, 1969-1970 and 1973-1974 Chevrolet Nova, 1973-1974 GMC K25/K2500 Pickup, 1974 Jeep Cherokee and 1969 Oldsmobile F85. See the Buyer's Guide tab for the full list and engine details.

Interchange: J8120586 · V375 · 8122347 · DV1808 · VC1765 · 1973448 · 1973450 · 1973470