The King Engine Bearings Main Bearings MB1190XA0.5 are high-quality bearings designed for use in automotive engines. These bearings are specifically designed to provide superior performance and durability, making them an ideal choice for high-performance and racing applications. They are made from high-quality materials and are precision machined to ensure a perfect fit and smooth operation. The bearings are designed to withstand high levels of stress and heat, making them suitable for use in high-performance engines. They are also resistant to wear and corrosion, ensuring a long lifespan. These bearings are available in a 0.5 oversize option, providing an extra layer of protection for engines that have been machined to accommodate larger bearings. Overall, the King Engine Bearings Main Bearings MB1190XA0.5 are a reliable and high-quality choice for any engine build.