i like the look from the rear, but they look a bit too far back on the first picture. I'd almost be concerned about carbon monoxide when the car is idling....
Yah, that was a concern when I first put the duals on when the outlet was even further tucked under the bumper but it hasn't been a problem.
As far as the size being too small, I wouldn't mind a little bit larger but just bought these locally to see how they would look. If I find some larger ones reasonably priced, it'* an easy swap. These were fairly short too which is what I wanted to keep them under the bumper cover.