I didn't like the way the original elbow fit, and I didn't like the idea of a piece of radiator rubber holding the turbo to the Y pipe. So I bought a piece of silicone in red with a 90* bend. $45 at my local place. Cut it to fit right, and Viola!
Fit's great, no more worries, and looks great.
Another angle:
I highly suggest anyone that is running a STi TMIC with the TD04 do this. Keeping the original elbow on there is no good. It barely fits. Rubber is ok, but the snail gets REALLY hot, and rubber and heat don't play well. If anyone wants the silicone (comes in a variety of colors), I can give you the contact info for the seller. It's cheap insurance for boost leak and safety.
I have a bunch of couplers left over from the original piece, almost 18". Now to figure out what to use it on....