hi there!! well i'm try to get my stock b6 converted with all oem usp parts but as you the rebar of usp its different than the stock one, so i was wondering if someone knows if the s4 rebar its the same as the usp, the reason i'm asking its coz i found a s4 rebar with the shocks for about $200.00 more than half a price of buying from the dealer the rebar and shocks !! so please if anybody has some info i will be thankfull !!