The only two upgrades i made were
- custom driveshafts/cvd's (the standart ones bend)
- spoiler
here are some pics of the driveshafts.
http://www.mijnalbum.nl/GroteFoto=RO47S4LX
http://www.mijnalbum.nl/GroteFoto=XYXARH4B
http://www.mijnalbum.nl/Album=DWRKTR3K
not sure if they work.