The group's upcoming record will be helmed by long-time producer DJ Muggs
B-Real, Sen Dog and producer DJ Muggs back together for first time since 2004
The hip-hop mainstays will play London's HMV Forum on June 5
The band also head up their own festival with Korn, Sublime, Wiz Khalifa in California tomorrow
Rap veterans have experimented with dubstep producer Rusko on 'Cypress X Rusko'
Rappers ask crowd if they're high during Main Stage slot