This GM 9223018 hub cap is a genuine NORS product for your 1999 Cadillac Catera Sport 6 Cyl. It is made of high-quality stainless steel with a polished finish, making it easy to install and lightweight. The hub cap comes in a silver color and is suitable for placement on the rear, left, front, and right sides of your vehicle. This hub cap is a vintage part that is compatible with 16-inch wheels and does not require any performance modifications. It is a great addition to your car's aesthetics and will give it a classic look. The manufacturer part number is 9223018, and it is an OE/OEM part that is made in Germany. This hub cap is sold as a single item and is not a universal fitment.