Where to bring the 1-3 and 4-6 pipes together.

Rug_Trucker said
I was thinking an H pipe as close to the collectors was a V8 thing. Thought the same for the 6.

I have full length duals on my Duster with an H. Now is the X more trendy?

It's not a cross over in the dual exhaust sense. It's a wye. Where two pipes come together.