Active Fuel Management | ACDelco AFM Lifters

In a V8 engine, Active Fuel Management (AFM) lifters are used to switch the engine from 8 cylinder operation to 4 cylinder operation to save fuel under light load conditions.
ACDelco AFM lifters adjust the valves on your vehicle’s engine for proper performance and are the GM-recommended replacement part for your GM vehicle’s original factory component.
Learn more: www.gmparts.com/