As Pistonheads puts it:

BROADSPEED JAGUAR XJ12C
Price: £POA
Why you should: As if you’re asking
Why you shouldn’t: This is the wrong website for you

(Yes, that is a quad side exit exhaust. Because of course it is)

http://www.pistonheads.com/regulars/ph-spottedykywt/broadspeed-xj12-you-know-you-want-to/35449