The shows – performed in 1988 and 1992 – feature on Guns N' Roses Live Radio Broadcasts, which will be issued on April 27.
The 1988 show was recorded on February 2 at The Ritz in New York, as the band's massive debut album Appetite For Destruction was starting to make big waves. The show includes a cover of Aerosmith track Mama Kin.
The 1992 gig took place on April 9 at the Rosemont Horizon in Chicago during the Use Your Illusion tour.