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Video - The 2010 K&N Horsepower Challenge pits the top eight NHRA Pro Stock qualifiers against each other The 2010 K&N Horsepower Challenge pits the top eight NHRA Pro Stock qualifiers against each other for a shot at $50,000. This year one lucky fan will have a chance to win a Harley Davidson motorcycle. K&N Vice President of Research and Development Steve Williams discusses the 2010 K&N Horsepower Challenge and what it means to both K&N and NHRA fans

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