X is a Los Angeles institution and a national treasure. John Doe, Exene Cervenka, D.J. Bonebrake and Billy Zoom define the West Coast punk scene, and their duration is a testament to the foursome’s timelessness.

X’s recent Hollywood performance, celebrating the band’s 31st anniversary, brought invigorating music to an appreciative hometown audience. Cervenka and Doe’s voices meshed determinedly during fan favorites, such as “Los Angeles,” “Nausea” and “Johny Hit and Run Paulene.”

Zoom mugged to the many picture-takers, pivoting his rockabilly/Chuck Berry-derived guitar riffs, while the crowd jumped and danced to classics like “White Girl” and “The Hungry Wolf.” Doe and Cervenka turned folkies on the second encore with an acoustic “See How We Are” that emphasized their arresting harmonies.

Openers Skybombers started the evening, a sturdy Melbourne, Australia just-out-of-high-school quartet who mix ’90s influences such as You Am I and Oasis with youthful energy, highlighted by catchy tunes like “It Goes Off” and a rousing cover of the Easybeats’ “Sorry.”