Thanks for all the help guys, greatly appreciated. Hopefully this thread will help a few others save some $$..
Now what I currently believe is that the rear shocks sold here as F4- BE5-B995-M0 have the follow specs:
Extended Length: 618mm (24.33 inches)
Closed Length: 388mm (15.28 inches)
Rebound of 2555Nm
Bump of 1035Nm
Rated at .52 Per sec
(This info was stolen from a previous post from TempestV8)
The OEM rears are 593mm open and 363mm closed
Now looking at shockwarehouse ( thanks Phil !) I found these:
Bilstein shocks and struts for cars and trucks - Shockwarehouse.com
F4-BE5-A464-H5
Extended Length: 25.93 inches
Closed Length: 15.91 inches
Travel: 10.17 inches
Valving: 170/60
At US$75.70 a shock it's very temping to give them a go.
Can anyone with more tech knowledge than me tell be if I am letting myself in for trouble?
Mark