Mastodon released their tribute EP to their late band manager Nick John, a cover of Led Zeppelin classic ‘Stairway To Heaven’. John, who also managed Gojira, passed away last September from pancreatic cancer. The limited-edition 10-inch vinyl features the Studio Version on Side A and a Live Version on Side B. It was made available in participating independent retailers on Saturday, April 13. All proceeds from the single will be donated to pancreatic cancer research. Lighters out and crack it up!