Upgrade your engine's performance with the King Engine Bearings MB5442SI Main Bearing Set, designed specifically for Ford and Mazda Duratec 2.0 and 2.3 engines. This bi-metal aluminum main bearing set offers exceptional durability and strength, ensuring a reliable fit for your vehicle*s needs. Crafted from a silicon-aluminum alloy, these bearings provide excellent wear resistance and lower friction, resulting in improved engine efficiency and longevity. The King MB5442SI set is engineered to deliver optimal performance, making it an ideal choice for enthusiasts looking to enhance their engine's capabilities without compromising on quality. Whether you're replacing worn bearings or building a high-performance motor, the King MB5442SI Main Bearing Set is a reliable solution that fits seamlessly into your engine. Trust in King Engine Bearings for top-notch quality and performance that meets your automotive needs. <b>Features:</b> * Material: Bi-metal aluminum with silicon base for enhanced durability: Material: Bi-metal aluminum with silicon base for enhanced durability * Compatibility: Designed to fit Ford and Mazda Duratec 2.0 and 2.3 engines: Compatibility: Designed to fit Ford and Mazda Duratec 2.0 and 2.3 engines * Performance: Reduces friction for improved engine efficiency and longevity: Performance: Reduces friction for improved engine efficiency and longevity