Improve ignition performance and fine-tune drivability with the Proform 66952C Adjustable Vacuum Advance Canister, designed for GM HEI-style distributors. This upgrade allows precise control over vacuum advance timing, helping optimise throttle response, fuel economy, and part-throttle performance on any classic or performance-built GM V8 engine.
£50.34
1 in stock
Improve ignition performance and fine-tune drivability with the Proform 66952C Adjustable Vacuum Advance Canister, designed for GM HEI-style distributors. This upgrade allows precise control over vacuum advance timing, helping optimise throttle response, fuel economy, and part-throttle performance on any classic or performance-built GM V8 engine.
Direct fit for:
GM HEI-Style Distributors
Suitable for most Chevy, GMC, Buick, Oldsmobile, Pontiac V8 engines equipped with HEI ignition.
Fully Adjustable Vacuum Advance – Dial in optimal timing for improved drivability.
Designed for GM HEI Distributors – Perfect replacement or performance upgrade.
Enhanced Throttle Response – Sharper low-speed and part-throttle performance.
Improves Fuel Economy – Fine-tuned timing helps efficiency under light load.
Durable Construction – Built to meet or exceed OE function.
Ideal for Stock or Modified Engines – Works on everything from street builds to mild performance setups.
With over 40 years supplying American car parts to UK enthusiasts, we keep trusted ignition components in stock — ensuring fast delivery and no import delays.
