Upgrade your Ford ECOBOOST 3.5L V6 engine with the King Engine Bearings Main Bearing Set, part number MB4549SI-STD. These bearings are designed for OE replacement, ensuring a precise fit and reliable performance. Crafted from high-quality SI material, they provide excellent strength and durability for your engine. The set includes four bearings, perfect for a complete overhaul or replacement. With a 1-year manufacturer warranty, you can trust in the quality and performance of this product made in Israel. Please note, this product may have California Prop 65 warnings associated with it.