In 2002, he teamed up with Mellow Man Ace and Son Doobie for the short-lived Serial Rhyme Killas, which released one 12" single in 2002. The group recorded a full-length debut album, entitled Deluxe Rapture, but it was never released. B-Real formed a rap metal group, Kush, with Deftones guitarist Stephen Carpenter and Fear Factory members Christian Olde Wolbers and Raymond Herrera. According to B-Real, Kush is more aggressive than other bands in the genre. He was also previously a member of the group The Psycho Realm, and in 2007 announced that he would collaborate with Sick Jacken once again on a new album. He revealed in an interview that he plans on recording a "vs." album with Cypress Hill member DJ Muggs.