I have a XJS IRS in my XJ coupe and it has the rear vented outboard rotors. Does anyone know the application for the calipers so I can properly order a new set. The rear rotors appear to be about 12 inches wide and about 20mm thick.

 

Your calipers are the same as stock. Only difference is the spacers between the two halves and the brake fluid hose you will need to swap over.

Edit:

My apologizes: I thought you were referring to vented inboard brakes. For outboard vented disc just go to RockAuto.com and you can find rebuilt calipers for a 95/96 xjs.

 

icsamerica,

I'm sure you might be able to find a pattern part cheaper, but the right hand one is still available from Jaguar if you need it:

Brake Disc and Caliper-Rear - Parts For XJS from (V)179737 to (V)226645 | Jaguar Classic Parts UK

Good luck

Paul