Eibach Question

[svtvnm]

Hi guys been a while since I've been on this forum i have aquestion for anyone that has a connection with Eibach, Was helping my mechanic pull the diff out of my cobra today and when we pulled the wheels of I wiped down the eibach schock absorbers and found a sticker which read "PROTOTYPE PART" and somethiong in german underneath, on both rear shocks. This Is the second unusual marking found on the car since I've had it, the last thing was when we pulled mufflers off to replace them they hadwritten on them with Black marker pen, "GENERAL EVAL VEHICLE".
http://i298.photobucket.com/albums/mm268/svtvnm/diff013.jpg

http://i298.photobucket.com/albums/mm268/svtvnm/diff015.jpg

http://i298.photobucket.com/albums/mm268/svtvnm/diff004.jpg