The ships are propelled by a Westinghouse steam turbine rated at 35,000 shaft horsepower (26,000 kW) turning one shaft using steam provided by two Combustion Engineering/Babcock & Wilcox boilers at a working pressure of 1,200 psi (8,300 kPa) and a temperature of 950 °F (510 °C).

For anti-submarine warfare (ASW), the frigates are equipped with an ASROC Mk 16 octuple launcher with a reload system sited between the superstructure and the 5-inch gun.

Two cells were re-configured to fire Harpoon surface-to-surface missiles in American service, but this ability was not transferred to the Mexican Navy.

Allende retains the Mk 25 launcher for the Sea Sparrow surface-to-air missiles that the vessels mounted in American service.

The frigates have a helipad located over the stern of the ship and a hangar capable of storing the MBB Bo 105 helicopter that operates off the vessels.

One, Abasalo, was sunk as an artificial reef 35 nautical miles (65 km; 40 mi) east of Tuxpan, Mexico.