Major advantages of upgrading to this part/product : 1. Upgraded material to aluminum 6061 T6 with POM collars inserted to minimize the tolerance hence the bearing is able to fit tightly into the knuckle arms for accurate turning. 2. POM is a fitted tightly to protect the bearing from falling off due to friction. 3. 3D streamline brings a modern and metallic appearance. 4. Two positioning holes for tie rods installation to adjust the angle.