Then you could just go with the dual tips. You will just loose a little top-end, but all the low-end and mid-range gains are still there. And I'm guessing you'll use the low-end/mid-rage power more than redlining it anyways...right?
I used to like the dual tips better. They look nicer when clean, but the single actually looks better when dirty. Because it's a bit smaller outside diameter than the duals, you can still see more of the nice shiny mufflers!