The Quest is over, I have found and attached the quiet muffler
Now something interesting, to why it is dual pipped...
The pipe on the left is the regular normal driving one, while the one on the right is more of a straight through design. It has a flange that opens when you gun on the car, thus opening up the exhaust gases to exit through there...
Normal driving pipe:
Blocked off until under load pipe:
And finally a video!