Quote Originally Posted by Venom
Part number shows no results on realoem

http://realoem.com/bmw/partxref.do?part=33531095710&showus=on&showeur=on
The options for the cars effect the spring choice, you won't be able to likely cross refernce the springs on realOEM.

I did have a quick look at eibachs website and a prokit for a Ti and Ci are different.