Originally Posted by RajB

Hi.

when fitting KW V3's you need the following parts:

01 Guide support 31306779604
03 Plate 31331096068
04 Self-locking hex nut 31106774714
05 Protection cap 31331090616
06 UPPER SPRING POCKET W/AXIAL CAGE BEARING 31331090612
07 SPRING PAD UPPER 31331091233
08 Support 31336780245
09 Additional damper (bump stop) 31336751594

Taken from the following link: RealOEM.com * BMW E53 X5 3.0i GUIDE SUPPORT/SPRING PAD/ATTACHING PARTS

Rears you do not require any additional parts as I believe the BC's have the rear spring round the damper body like the front setup. For the KW's you need the upper spring perch.

But I believe the BC's come with the upper spring perch etc so you may not need no7. Until you get the coilovers or someone can chime in with what comes with them I'm just guessing at the upper spring perch.