I have a completely custom set of true dual. Originally I wasn't going for true duals I was just going for a dual look but with how I wanted it to look it couldn't be done. It cost me a pretty penny to have all of it done but I have all stainless steel piping, had LT headers put on also, as well as a custom dyno tune to go with it. All in all though I love what I had done. It looks and sounds great. I get compliments all the time on it. I even recently had the truck in the shop and even the guys at the shop said the exhaust work was the best they'd ever seen. You get what you pay for!
Here's some pics
LT Headers into 3" piping
Piping goes back into DMH 3" cutouts and then a Magnaflow muffler
Then from the muffler it exits into dual tips in front of each wheel
It is this same setup on both sides