Well i've been and spoken with one Geoff Madden, gentleman exhaust fabricator and the guy who (used to) supply Carbon Can Company their exhausts, and hopefully by next weekend I'll be able to post pics of my custom system.

As far as I'm aware no one has done a twin stack set on an XTX before, least no pictures, and I'll be interested to see how it works. The system will still effectively be 2 1 into 1's.

Will post pics once done.