GENUINE GM AFM ACTIVE FUEL MANAGEMENT LIFTER SET FOR HOLDEN CALAIS VZ VE VF L76 L77 6.0 V8These Active Fuel Management (AFM) hydraulic roller lifters are designed to conserve fuel during driving situations that require low power demands. These lifters effectively deactivate unnecessary cylinders as needed to improve engine efficiency and a reduction in exhaust emissions. This kit comes with a full set of lifters to replace all worn out lifters in the AFM at once. These AFM lifters suit Holden Commodores and similar platforms fitted with