i have brand new eibachs all around.
I have wk bilsteins in the front about 5 thousand miles/
QA1 in the rear. Currently set on 7.
about 1 thousand miles on this set up.
I have banged in the front twice. was rather severe DIPs.
I have not bottomed out in the rear TO DATE/
When i installed the stuff, in the rear, i didnt use the 2+ inch spacer eibach gave. Only a little short aluminum mount for the rubber bump stop.
I did NOT do any bumpstop trimming in front
I missed that ) i thnk it says to cut them in half....could solve my banging.