my boyfriend is an exhaust technician and says that with the cannon muffler being the only silencer in the system you will have to leave the resignator in the system otherwise it will drone terribly unless at high revs, then it will bark....
you best bet would be to get the pipe work remade...
just to give you an idea of what you are up against....
all of VW's turbo diesel powered vehicles have better performance figures than their petrol counterparts when talking in terms of straight line speed that is.
i know a few ppl in the VW buisness and most of them have the t/d's as their...
my bf's boss is a engineer/mod plater/compliancer and said that you have to remove everything to that no-one can sit in the back. seats, seatbelts etc... and you have to get it mod plated no real need to see an engineer at all, well thats the rules in qld anyway.