The D&D is longer so this may casue you some issues.
I ran a D&D with a SW single and a can- Fit was great.
But I will tell you that getting a head/ running a Y pipe/ and a aftermarket can- will enable you to tune your box more precise that having a single pipe on that sled.
After dumping the pipe ( SW/ SLP) Tried them both- the sled actually likes the stock pipe!
CAt did their homework on this one for sure.
Tuning these mod's to a stock pipe-really makes the difference-so if you do all you mod's and have diffucltly tunning it-the stock pipe on paper may look like it makes less power- but it will get you further on the hill, the torque is better 4-sure and your not always playing the balance of the tuning........
MD