Originally Posted by kelvin2010
I'm trying to lower the car today. When I turn the purple ring, the black piece on the top moves together...
maybe something wrong with the installation??
Nothing is wrong with the install! It's just that the top piece has nothing to keep it from spinning. To make this simple, you can remove the control arm nut and bolt 21mm, 2 inverted torx bit and the shock's 17mm lower nut. That will allow the spring perch to drop down for you to remove the adjustment ring and then adjust it to your likings.
Or do what the above said!