So I just installed the d2 rs coilovers on the r53. Whenever I hit a bump or even go past 100 MPH there is a very loud and odd clunking sound only on the passenger front. Now the car is lowered 2 inches and I did 5mm spacer in the front to prevent tires tubing on coil. Also adjustable tie rod ends. And even went a step further and put a new control arm bushing in. Any bumps what so ever will make the clunking sound and at high rates off speed the stearing wheel vibrates like a mini death wabble

 

I would guess the large bolt on top of the strut is not tightened all the way.

Nik