San Francisco Bay Area metallers MACHINE HEAD will perform at the Sturgis Buffalo Chip on Wednesday, August 7. They will take the Buffalo Chip's stage following MASTODON during the 2013 Sturgis motorcycle rally in South Dakota. Visit BuffaloChip.com for summer music festival information and campground admission passes."MACHINE HEAD is nothing short of exhilarating," said Rod Woodruff of the Sturgis Buffalo Chip. "Unparalleled in performance, originality and energy, MACHINE HEAD is clearly at the top of their game and will be perfect for hard rock lovers at the Chip." The 32nd annual Sturgis Buffalo Chip motorcycle and music festival takes place August 2-11 during the annual Sturgis motorcycle rally. The summer music festival lineup already includes KID ROCK, TOBY KEITH, ZZ TOP, HALESTORM, BRANTLEY GILBERT, QUEENSRŸCHE and SUBLIME WITH ROME. More bands will be announced soon. MACHINE HEAD in February parted ways with bassist Adam Duce. The band's guitarist/vocalist Robb Flynn explained in an online posting: "We may have fired Adam on [February 11], but Adam quit MACHINE HEAD well over a decade ago. He just never bothered to tell anyone… but we all knew it." A replacement bassist has not yet been announced. MACHINE HEAD's most recent studio album, "Unto The Locust", sold more than 17,000 copies in the United States in its first week of release to land at position No. 22 on The Billboard 200 chart — putting MACHINE HEAD in the Top 25 for the first time in the band's 17-year history.