other things I am remembering from the job - your intake manifold will also be constrained by the fuel rail - watch the injector tips. you'll also need part #6 on this diagram to keep the insall as oem as possible:
http://www.********************************************.com/porsche-parts/hardparts.php?dir=987C-06-08§ion=106-00
otherwise, you may encounter a bit of fuel vent line interference at the bottom of the air box; you may need to saw-off the fuel vent line retaining clip boss to get the air box to sit flush against the inner wheel well.
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