NHRA Stock Elimination Driver David Rampy, Super Comp Drag Kathy Fisher, Super Gas/Top Fuel Shawn Langdon, Comp Stock Elimination Racer Luke Bogacki

K&N conducted interviews with several NHRA Pro Stock Racers including Ron Krisher, Mike Edwards, Allen Johnson and Warren Johnson

Eight lucky fans had a chance to win a new Harley-Davidson Street Bob motorcycle. Watch top racers battle to win the K&N Horsepower Challenge Championship

Each contestant was randomly paired with an NHRA Pro Stock Driver. Their driver's success would determine if they went home with a new Harley motorcycle

NHRA Pro Stock Drivers Jeg Coughlin's Chevy Cobalt, Greg Anderson's Summit Racing Equipment Pontiac GXP, Roger Brogdon and Jason Line with 2009 Pontiac GXP

Modular Depot's Greg Brown about his 507 horsepower, 2010 Chevy Camaro. Modular Muscle's Nick Eminoski wants a little more out of his 1998 Mustang Cobra.

K&N talked with Mario Buendia, from the Revolution Car Club, about his passion for modified cars and what got him started modifying cars in the first place.

NASCAR K&N Pro Series West Drivers Justin Johnson, Dusty Davis, Luis Martinez Jr. and Josh Combs discuss racing careers and challenges on the race track

NASCAR officials Butch Schaefer and Bob Jacobs explain technical requirements race teams adhere to in order to race in the NASCAR K&N Pro Series

Stunt bike rider Joe Dryden on how he started in motorcycle stunt riding, why he competes with an Aprilla, and the feeling he gets riding for so many fans