"TTP has a 3.4 in a Boxster Airbox with the properly sized MAF housing (
http://www.t-t-p.de/english/airbox.php) but they want $1500 for it. That seems a bit much."
I have the TTP intake and like it, but it is a very strange beast. It has a carbon fiber airbox, no idea why that is necessary, but it looks cool. It also has a very well CNC machined aluminum MAF sensor and filter element holder. But then the TTP intake kits come with large diameter flex hosing to link to the engine, cheezy at best, and almost a joke for the price. I got my indy shop to fab a custom connection from the MAF and intake box that works very well.
Ed