"We are pleased to extend the sponsorship of this important bonus event for Pro Stock racers with our friends at K&N Engineering," said Gary Darcy, senior vice president of sales and marketing, NHRA. "The K&N Horsepower Challenge certainly brings an increased level of excitement to the NHRA Summit Racing Equipment NHRA Nationals."The winner of the K&N Horsepower Challenge will earn $50,000, and the runner-up will earn $10,000. The two semifinalists will earn $3,000 each, while the four first-round finishers will receive $2,500 each."K&N is committed to making the Horsepower Challenge the premier Pro Stock event at Summit Racing Equipment Motorsports Park," said Steve Williams, vice president, K&N Engineering. "This year we are paring up eight lucky fans with the top eight drivers for a chance to win a Harley-Davidson Street Bob motorcycle, all they have to do is go to KNfilters.com, vote for their favorite driver and register to win."The K&N Horsepower Challenge features an overall purse of $145,000. In addition to the $76,000 K&N Horsepower Challenge, K&N also will award $69,000 in qualifying bonuses to quick Pro Stock qualifiers throughout the K&N Horsepower Challenge series. Low qualifiers earn $3,000 at each of the 23 events in the Challenge series.Last season Jeg Coughlin claimed his third title in the prestigious race-within-a-race bonus event. Other past winners of the K&N Horsepower Challenge include Greg Anderson, Dave Connolly, Kurt Johnson, Warren Johnson, Darrell Alderman, Larry Morgan, Jim Yates, Bruce Allen and Bob Glidden.