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Video - The K&N Horsepower Challenge takes place over 23 races, and drivers qualify at each of the events The K&N Horsepower Challenge takes place over 23 races, and drivers are awarded points for qualifying positions at each of the events. K&N's new patented hood scoop technology may give these competitors a chance to set some new world records over the next year. We check in with the drivers as they prepare to battle it out at Infineon Raceway in Sonoma, California

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