modify a dansk 1 in 1 out to a 1 in 2 out.
 

I'm looking for some insight or some direction to modify my dansk muffler. I want to make it a 1 in 2 out, except I don't really know the proper location to put the second hole or how to. I am skilled at welding so this wont be a problem.

You can simply tap a 2-1/4" hole at the passanger side and postion the pipe to match the driver side.

But from my understanding you want to open up the internals to re-direct the flow to pass evenly to both outlets.

A search will yield what you are looking for.

I am planning on welding a automatic cut out so at speed I can open the cut out.

Muffler Mod
 

Here's how I went about it on my Bischoff:

http://forums.pelicanparts.com/porsche-911-technical-forum/253295-sc-carrera-bischoff-muffler-modification-mod-gut-gutting-dual-two-out.html?highlight=gut

Good luck, it was a fun project and I love the sound.

Gordo