What was the name of a instrumental song ACDC did?

The name of the instrumental song by AC/DC is "Let There Be Rock". It is the title track of their fifth studio album, released in 1977. The song is an instrumental hard rock piece that showcases the band's musical prowess and features extended solos from guitarists Angus Young and Malcolm Young. It has become one of AC/DC's most iconic and well-known songs, often used as an opener or as a showstopper during live performances.