[1] The band was composed of Katon W. De Pena (vocals), Scott Owen (guitar), Gary Monardo (bass) and John Tabares (drums).

De Pena reunited the band with the original lineup of Scott Owen, Gary Monardo, and John Tabares, releasing the El Diablo Negro EP in 2000.

[7] The lineup completely changed, and Hirax released the album Barrage of Noise in 2001 with James Joseph Hubler, Justin Lent (Clusterfux), and Nick Sellinger.

In 2003, De Pena recruited an entirely new lineup again, and released the album The New Age of Terror in 2004 with guitarists Dave Watson and Glenn Rogers (formerly of Deliverance), bassist Angelo Espino, and drummer Jorge Iacobellis.

The band released their fourth studio album, El Rostro de la Muerte, in the spring of 2009.

March 2015 saw the band play in the UK for the first time in their history, beginning with an appearance at Hammerfest in Gwynedd, Wales.