I installed the new, Dual Wall Tips this evening.
Wow, what a difference in look. The single wall tips just don't look as nice.

As for power? Hell I don't know. If there is a differnce in HP, I can't feel it.
But the dual tail pipes in stainless really do look nice.

I think that the departure angle will be shortened a bit, but since I haven't really done serious off roading, it doesn't mean much to me.
If I need to, I can always remove the tips. The pipes hang pretty close to where the original was, and the performance muffler is smaller.

I'll post some pics up in a day or two.