Just go down to an exhaust shop and get a 3in pipe made up of mild steel, $140-$250 depending where you go. You could also just buy some alloy 3in mandrel bends from supercheap/autobarn/exhaust shop and some silicon/rubber joiners and make one up. They come in straight, 45-180-90-30 degree bends. Just be aware that bonnet clearance with a 3in pipe across the broad band manifold is an issue and you need to get it exactly right so it doesn't vibrate on the bonnet.
After all this is send, the only real restriction on the AU factory piping is the tapered down strut tower pipe. If you just replace that pipe with a length of 3in pipe to your pod filter, that would do the job nicely. cost about $30.
cheers...........
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