Hard rock fans can get primed for the upcoming fall tour from UFO by celebrating their legacy with a new box set scheduled for release on Aug. 9.

The Morton Report reveals that the band’s most successful period will be chronicled with a staggering five-CD box set featuring their most successful tracks paired with an ample amount of rarities, B-sides and live tracks.

The jewel of this forthcoming box set is a previously unreleased 45 minute live recording captured at the band’s first U.S. show in Atlanta, back in 1974.

‘UFO: The Chrysalis Years (1973-1979)’ gathers a total of 81 tracks including album versions of the essential fan favorites, plus some interesting alternate versions of some of those same songs, including John Peel session recordings of ‘Lights Out,' ‘Too Hot To Handle,' and the single edit for ‘Doctor, Doctor.' You can check out the entire track listing here.

The current lineup of UFO is hard at work on a new album, which they say will feature ‘an abundance of good material.’ They’ll take a break this fall to return to the U.S. for another round of touring after a successful trek (editor's note: which we had to miss to cover the $#@% 'Billboard Music Awards') earlier this year.

Watch UFO Perform 'Lights Out'