Here is the Bilstein part# out of their catalog. Ask for some feedback as some were having a little clunking although it may not have been the shocks and just control arms that were worn which wear out quickly on C5 Audi's and especially the RS6 due to the extra weight it carries.

BILSTEIN - - 9-way Perf Susp Sys (PSS9)


LIST PRICE: $2,466.00 Part Number: F4-GM5-8868-H2

BILSTEIN - Audi A6/S6/RS6 4B 4WD ;K; B16
[LIST][*] Setting: 9-way Perf Susp Sys (PSS9)[/LIST]