I had this fitted on my old AU 1 and was the perfect height, just wondering if the front springs from the AU S1 will fit on a BF XR6 as im considering swapping them over. On the Eibach direct site the part numbers are similar and the Ute springs are listed as AU/BA. I know there was a change in mounting points or something on AU 2 but AFAIK i didnt specify AU 1 when i bought the set 2 years ago.