Hi,
Had my X4 35d lowered using H&R Springs 28926-1 for BMW X3 F25 X3 + X3 M40i X4 F26 incl X4 M40i, they say drop by 35mm but at this stage it's more like 25mm front/back, it's only been 3 days so hopefully it will drop at least another 5mm.
The X4 looks much better, looks more like a car coupe rather than a TRUCK coupe.
Had wheel alignment done today, rear wheels where out a lot but expected, after alignment wheels are pretty much back at standard for toe/camber.
Got the springs from TunerShop, best price I could find and even didn't have to pay import duties or GST to Australia.
Ride is only slightly firmer but I found original springs to be a little bouncy, cornering is far superior with H&R.
Cheerz