This challenge tests horsepower, speed, engineering, drivability, and ride comfort. Among participants, 2009 Nissan Skyline GTR R35, 2008 Mitsubishi EVO X

See Wicked Racing's Dan Morrison and co-pilot Karen McGuire at Webb's Slough in St. John's, Washington take on mud, water, sharp turns, and amazing speed

NHRA Pro Stock driver Allen Johnson powered his Team Mopar Dodge Stratus to a perfect light and big money in the K&N Horsepower Challenge. Part 3 of 3.

Eight NHRA Pro Stock drivers competed in the 2008 K&N Horsepower Challenge at the 2008 NHRA Summit Racing Equipment Nationals.

The 2008 K&N Horsepower Challenge pitted the NHRA Pro Stock qualifiers against each other at the NHRA Summit Racing Equipment Nationals in Norwalk, Ohio

K&N Powersports air filters, air filter assemblies, ATV Powerlids and oil filters. Performance and protection in the dirt and on the street.

The fastest open road race in the world is the 2008 Silver State Classic Challenge. This year featured Corvette Z06's, Several Dodge Vipers, and Ford GT's

K&N Chairman of the Board Jerry Mall drove K&N Mitsubishi Lancer Evolution 2008 Silver State Classic Z2Z Challenge. Second place finish

AMA Superbike circuit's Millennium/KWS Suzuki Racing Rider Ben Thompson and Team Manager Chip Spalding discuss why they use K&N performance technology

The USAC Banjo 100 hosted some of the best sprint car racers for a night of racing excitement