Be aware that the online parts catalog from Rockauto.com shows various front wheel hub seals for the XJ40 and X300 cars that DO NOT FIT!
They have seals such as a SKF 18565 or a Centric 41720003 listed for the application and all of these seals have an OD that is too large to fit into the bore of the hub.
On the XJ40 AND X300 cars the bore on the inside of the front wheel hub is about 2.355 inches and the OD of these seals is over 2.5 inches so there is no way that they will fit, no matter how large the hammer being used to drive the seal into place.
The ONLY seal shown in their catalog that IS CORRECT is the Beck-Arnley 052-3413
I did look for a way to do that.
Unfortunately there is NO WAY to contact them via their web site as there is no general contact form or an email address listed anywhere to send them a note about something like this.
OK, so I sent an email to this service@rockauto.com address but I bet it goes right into the roundfile and they do not make any changes to their catalog as a result of the feedback.
This has happened to me several times with their website. I’ve just had to eat the restocking fee. Take the pictures they show for each part as gospel.