I'm not a cat guy...yet, but I was looking at some pics that you turbo boys have posted and a thought/idea occurred to me. Would it be possible to take the pipe on an M and flip it over so that the bend in the pipe was over where the can would be? And then mount your turbo in sort of a mid-mount setup? I'm sure that it would take a lot of thought and fab work to accomplish but with the turbo being so close to the charge box I would think that there would be little to no lag. You could also plumb the exhaust to exit out the stock location too. I'm not sure of the feasibility just thought that it might be a decent discussion topic. Lets here what you have to think!