Originally Posted by jmitro

I didn't like the higher stance on my 06 X5 4.4i, so decided to convert to BC BR coilovers. It had standard coil springs front and air suspension in the rear. I asked for standard spring rates. Unfortunately, in my haste to disassemble everything, I forgot to measure the ride height and alignment. But I estimate I dropped the car about 3" from stock.
I also swapped from 19" rims to 20" 4.8is rims and 15mm spacers from ECS tuning. The stance looks more aggressive now, IMHO. I set the dampers at full soft F/R; the ride is very compliant except for really rough roads which bounce the car around, but I haven't yet played with shock settings. At the current ride height, the very outside of the rear tires scrapes very lightly over big bumps.

Notably, I removed all the rear air suspension components, which left a big hole in the chassis. I decided to weld it shut so fabbed a cover plate and welded in place. Still needs seam sealing underneath to make it rustproof.

As a side note, I recently moved in to a house with a two post 9000lb lift. Wow, this is SO nice!