I modified my own exhaust. (Because i'm really cheap)
 

Anybody else done this?
cut open the rear muffler, opened a flap, pulled out all the fibreglass, covered the muffly holes in the internal tubes, bent flap back, screwed in place with sheet metal screws (drilling titanium is a biznitch)
sealed cuts with Hvac foil tape, Voila......
Awesome sounding exhaust for free. No kidding.
There is a heat shield above the muffler boxes anyway... I figured if it went bad, I was going to buy the quicksilver rear section anyway. But it worked perfectly.

lol, Good on you,i've thought of this after seeing rear exhausts on ebay for £150.Better £150 than just under £2,000

Good , never did that on a car but have on a few bikes

How loud is it? I'm running stock but want more rumble but not so loud that the sound doesnt match the bentley brand.