Jaguar XJ (X350). For the Jaguar XJ (X350), also known as the XJ6, XJ8, or XJ TDVi from approx. 2003 to 2007 (although a small few were produced after 2007). This is not an original Jaguar part. For those with knowledge of stainless steel this is 316 grade, which is a high quality grade stainless that will maintain a bright appearance.