The 2007 Gatorade Duels were overshadowed by one of NASCAR's strangest technical scandals. After qualifying at Daytona International Speedway, NASCAR inspectors confiscated the intake manifold from Michael Waltrip's No. 55 Toyota and reported finding an unidentified substance inside it. A replacement manifold was installed, but the same substance allegedly appeared when the engine was tested again, prompting NASCAR to impound the entire car and eject crew chief David Hyder and Michael Waltrip Racing competition director Bobby Kennedy from the track on February 14, 2007. NASCAR ruled that the team had violated the rule forbidding the blending of gasoline with alcohols, ethers, or other oxygenates—an alleged performance-enhancing fuel mixture that the media quickly labeled 'rocket fuel.' Waltrip's qualifying time was erased, Hyder was fined $100,000 and suspended indefinitely, Kennedy was also suspended, and Waltrip and the team each lost 100 championship points. Waltrip was allowed to race a backup car in the first Duel and finished eighth, preserving his place in the Daytona 500. The penalty temporarily left him with a negative championship total: after finishing 30th in the Daytona 500, he stood at minus 27 points. NASCAR never publicly identified the substance, which gave the episode a lingering air of mystery. Kennedy took a six-month leave and was later dismissed before returning to MWR in 2008, while Hyder was ultimately fired and treated as the person responsible for the scandal.
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