A heat-resistant power armor worn by Enclave soldiers and Enclave Hellfire troopers. This armor is equal to the T-51b power armor but not winterized T-51b, in terms of DR, item HP, and weight. The armor has an advantage of +35 Fire Resistance, +15 Radiation Resistance and +1 Strength. The helmet offers +5 Fire and Radiation Resistance, but at the cost of -1 Charisma. The Enclave Hellfire armor can be repaired with other sets of Hellfire armor.

Feed the flames with Power Armor V2 Hellfire paint!

Enclave Hellfire troopers are identifiable by Enclave Hellfire armor and flamethrower weapons. Often encountered starting at mid to high levels, Hellfire troopers are often paired with up to three standard Enclave troopers and occasionally an Enclave officer, whether on patrol, stationed at an Enclave outpost, or inserted into the field via randomized vertibird drop-off points.

X-01 is a set of power armor created shortly before the bombs fell by the scientists at Nuka-World in 2077 as a part of a cooperative initiative between the U.S. Military. This unique variant is known as the Quantum X-01 power armor, and can be found at Starport Nuka. It was also utilized by military offshoots after the war.

X-01 power armor provides the greatest defense among all models of power armor featured in Fallout 4. As with all power armor in the Commonwealth, a power armor frame is required to mount X-01 power armor and spawned pieces can vary from Mk. I to Mk. VI models.