The product is a genuine OEM rear diff side bearing for Nissan Skyline R33/R34 GTR models with engine code RB26DETT. Made by Nissan, the bearing is specifically designed for the rear placement on the vehicle. The manufacturer part number is 37440-15U00, ensuring compatibility and quality for your car's transmission and drivetrain system. Ideal for those looking for a reliable and authentic replacement part for their Nissan Skyline GTR, this rear diff side bearing is a crucial component for smooth and efficient operation of the vehicle.