The Ford BL3Z-4621-B Rear End Pinion Bearing is a genuine OEM part designed specifically for use with 2005-2010 F-250 and F-350 trucks, as well as 2004-2011 F-150 models. Manufactured by Ford, this pinion bearing is a high-quality component that ensures smooth and reliable operation of the rear-end differential in your vehicle. With the manufacturer part number BL3Z-4621-B, you can trust that this bearing is a perfect fit for your Ford truck and will help maintain optimal performance for years to come.