April 3, 2007, saw the release of their fourth studio album "Don't Mess With The Dragon", which was co-produced by K. C. Porter and released on Concord Records. The genre-crossing album was written at a local Los Angeles Latino art gallery, Tropico de Nopal. The album includes songs such as "After Party", which pays homage to old-school Chicano R&B, "When I Close My Eyes," which nods back to Fishbone and Oingo Boingo, "La Segunda Mano," which features the vocals of Quetzal's Martha Gonzales blending son jarocho with hip-hop, "City of Angels," which celebrates the city of Los Angeles, and "Temperatura," which was inspired by the May 2006 pro-immigration marches. The band also experimented with a more accessible Latin-pop sound on songs like 'Can't Stop' and 'Here We Go,' and for the first time featured more English lyrics than Spanish lyrics.