You can get that wing from a guy by the name of Crazy Paul over on the G8 boards. I think all G8's come stock with that little lip spoiler and thats the only option we have.
Go here, I think you should be able to see the thread if you dont have a login for this site. This guy did the whole trunk conversion.
http://forum.grrrr8.net/showthread.p...highlight=wing
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2008 G8 GT - 334whp/358tq
D40 - Nikon 18-105 VR | Nikon 35 f1.8 AF-S | Nikon SB-600 | PP'ing with Lightroom 2