Metallica & My Chemical Romance To Headline The West Coast’s Biggest Rock Festival Also Featuring Rancid, Social Distortion, The Offspring, Machine Gun Kelly, Rise Against, Volbeat, Gojira, Mastodon, Parkway Drive & Many More Festival Expands With The Addition Of A Fourth Night, Headlined By Limp Bizkit Single Day, 3-Day And 4-Day VIP & General Admission Passes On Sale Now Danny Wimmer Presents is excited to announce the return of Aftershock—the West Coast’s Biggest Rock Fest