"Quilombo" features Benji Webbe and DJ Lethal. Webbe turns up again on "Prejudice".
Christian Olde Wolbers on "No".
"Jumpdafuckup" (feat. Corey Taylor of Slipknot and Stone Sour)
"Son Song" features Sean Lennon...the son of John Lennon and Yoko Ono. He performs the chorus of the song, and can be heard in the final seconds of the song talking about Cavalera's heavy-gauge strings hurt his fingertips.