Here is the stealthy exhaust that I just installed on my DSM. I bought an ebay muffler that was 3inch in and 3inch out. I just found the cheapest one. This one was roughly $60 shipped!! Pretty good. Its full polished stainless steel. Though, the polished part didnt concern me.
These pictures were right off of the vendors site. The tips are closer to 2.75 inch outlet each, but being that there is 2 of them, it shouldnt make much of a difference.
I then procceeded to paint the muffler black. I had some black primer, and some black high temp engine enamel paint around the house that I used. But most of the cans of high temp can be had for under $5 each. I painted it black to make it more stealth looking.
I taped up the tips of the muffler, so that those would remian polished and look pretty clean/stockish.
Here it is with the rattle can job and taped removed. Stock looking polished tips!
Here it is installed. The shop could have done a better job, but it will work. I replaced my APEXi N1 muffler with this one. The exhaust shop made me a whole new axle back system. So If I really wanted I could go back to the N1 look.