King HP & XP race bearings have already led to new records on the race track. King?s ability to meet the continuously changing and challenging demands of the racing industry with our unique materials and geometric features are a testament to the quality and reliability of our bearings, and reinforces our commitment to developing the ultimate race bearings. The King Racing line contains Sport Compact and Domestic engine bearings. Equipped with advanced materials and construction techniques, King Racing bearings extend the limits of power, performance and durability.