is that single or duel? and what size did you go for 2.5 or move up to the 3 inch?

https://www.google.ca/url?sa=t&rct=j...44158598,d.cGE

Actually sounds better when its driven.

The mac exhaust on plotniks car sounds awesome.

I've experimented a bit with exhaust on my '07 and can offer some advice, but it is really up to your ear... What pleases mine may not work for yours.
Any pair of axle-backs for a GT will also fit the V6. The right side muffler will bolt right in place of the stock V6 muffler, and the left side muffler can be used later for the dual exhaust conversion if you decide to go that route.
Whichever way you go, ditching the stock V6 muffler is a good idea. The interior piping is very small and restrictive. Even a single GT muffler is a huge improvement in flow and makes a difference you can feel (and hear). They actually sound pretty good on the 6er, too. I bought a pair of GT take-offs for $50 and ran just the single one for a couple of years until I went to duals. Lol, I made just over 300whp through that single GT mufler.
I also tried a single MAC V6 axle-back. I didn't like it. Too loud and raspy. I had it on the car for about a week, and couldn't take the drone. Now it's an ornament in the garage...
A 3" pipe would be a bit of overkill on most 4.0s unless they're running a turbo or supercharger. I thought about staying single and going to a custom 3" pipe after adding the blower, but caved, and went with duals.

If you know right away that you want to go dual exhaust, there are a couple of ways to go. You can buy a complete kit like the one from FRPP or Magnaflow and others, or you can get an X or H pipe, and build your own kit. H-pipes typically give a "chunkier" sound that has a deeper tone, while X-pipes are smoother sounding with a slightly higher pitch. I went with the latter on mine. I used the Magnaflow X-pipe #16411, then all I needed was the over axle pipe for the left side of a GT (right side is the same pipe for GT/V6), and the hangers for the axle-back that I already had. If you decide to go duals, you'll either need to cut your rear bumper cover, or get one for a GT. I cut mine and it turned out pretty good. I like the clean look of the V6 bumper over the GT one.
I've tried different mufflers on the duals as well. The stock GT mufflers are still some of the best sounding on the V6...nice tone, not too loud, and a bit of snap and crackle like the GT has. The FRPP GTB "Bullitt" mufflers from the 2008 Bullitt Mustang. These are similar to the GT mufflers, but with larger resonated tips. A little more volume than the GTs, but you lose a bit of the snap and pop. I also tried a pair of Corsas. They sound nothing short of awesome on V8s. That didn't translate well to the V6... They were too loud for my taste, with lots of snaps and pops when getting of the throttle or pulling a shift. True to Corsa's form though, as loud as they were outside the car, inside was relatively quiet and totally drone free. They're now a couple of very pretty ornaments in the garage. I'm back to the GTBs for now.

link to the X-pipe...MagnaFlow Exhaust Products - For Trucks, Suv's, American Muscle, Diesel, & Sport Compact Vehicles

On my V6 I went with a pair of Stock GT take offs and an H pipe. Picked up a used GT rear bumper cover. I like the looks and the sound of it. The cost was $50.00 for the take offs, $350.00 for H pipe, pipe for drivers side, hangers and clamps installed. Bumper cover and to have it painted and installed $200.00. I believe there is a big difference in the performance.

For the sake of comparison to the GT bumper that Autonut posted, here's a shot of a V6 bumper with the extra cutout added...

i'm with roddy,i use stock gt mufflers on my car and they sound the best.it is a duel kit on my car.the best way to make a v6 sound good is to keep it quiet.the gt muffs are a nice package for the v6.imho that is.

Its duel. And yes, we moved up to 3 inch.

gt or flow master

Thanks a lot for everyone's help ,but I'm still leaning towards Magnaflow street series,it's got a nice deep note and doesn't seem to have much ,if any drone.The cars 2011 and up all come with dual exhaust, so I want to go with the axle backs.