Substitution Mass Confusion: A Tribute to The Cars is a 2005 compilation album featuring covers of songs originally performed by the American rock band The Cars. The album was released by Not Lame Recordings. Many of the performers featured on the album were from the Boston area, where The Cars first gained exposure in the late 1970s. The line 'Substitution Mass Confusion' comes from a lyric in the Cars song "Bye Bye Love".