The spoiler was already fitted to the car when I got it its carbon, on the rams there is a small hole and the ram turns and releases the spoiler easy to remove.
Here's a link to a place in the states you can also get them in FG
http://www.ebay.co.uk/itm/Porsche-996-Turbo-GT2-Hydrolic-Bi-Wing-Spoiler-CARBON-FIBER-The-Best-Upgrade-/140668019020?pt=Motors_Car_Truck_Parts_Accessories&hash=item20c077a14c
On the turbos, have a good look at the rads(3 of them) prone to going due to them being leaf collectors, check the spoiler rams for leaks (expensive to replace), waste gate actuators as they hang under the car and get alot of abuse from the weather and corrode/stick or get sloppy had to replace mine due to this. Other than that its the usual stuff leaks noises etc