I'm about to drop my car and I wanted to know if there's any good write up DIY on f10 lowering, especially on 550i ///MSport, NONE iXdrive. I've done a Mercedes Benz W211 Sport in the past and is not that complicated. I did a little bit of research and it seem fairly easy. But, I just wanted to see if there's any trick that would be easier or I should pay close attention to certain area.
I also did some research on 3 types of springs (ACS,H&R,Eibach).
ACS springs is too soft, front is too low, ride bouncy.
Eibach only give .85" drop, not much of a drop, but the ride is very comfortable and stiff for 21" wheels. I had Eibach on my previous car W211, it ride nice and stiff on cornering. I don't mind going with Eibach again, but it just sit too high from the wheels.
H&R give it the right drop with 1.4 & 1.3" on the car, still give a comfortable ride, mean while sit a little lowering. It also stiff on cornering. This fit perfectly for 20" wheels. So I decided to go with this set up.
I had 20" wheels so I decided to go with H&R springs. I don't want to spend $3K on KW coils, and Megan coils is a joke.