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Alan Arthur Gustafson (born August 5, 1975) is an American NASCAR Cup Series crew chief who works for Hendrick Motorsports as the crew chief of their No. 9 Chevrolet Camaro ZL1 driven by Chase Elliott in the NASCAR Cup Series. He and Elliott won the 2020 NASCAR Cup Series championship together.
He was previously the crew chief of Hendrick's No. 24 car from 2011 to 2017, working with Jeff Gordon from 2011 until his retirement in 2015 and then Elliott in 2016 and 2017. Prior to that, he crew chiefed Hendrick's No. 5 car from 2005 to 2010, working with Kyle Busch from 2005 to 2007, Casey Mears in 2008 and Mark Martin in 2009 and 2010. Prior to that, he was the engineer and shock specialist for the No. 5 car, an engineer for former Xfinity Series teams Blaise Alexander Racing and Diamond Ridge Motorsports as well as former Truck Series team Arrington Racing.