What are these? Were on top of struts inside engine bay, ie on paint side.
I asked exactly the same question when I removed these from my car. US updated its DOT headlight height rules after our cars were designed, so BMW came up with a US only solution in the middle of the e9 produciton run. These spacers were fitted at the top of the front struts, and a US specific fatter rear spring perch was used in the back. This had the effect of raising the entire car off the suspension without altering the suspension geometry.
If you merely remove the front spacers, you will have more rake than a european car because of the rear spring perches. And when removing the front spacers, you can obtain shorter strut mounting bolts (european cars all had the shorter bolts). Both types of mounting bolts have a knurled end and are pressed into the strut assembly. Knock the old ones out with a hammer and press in the new ones if you want the shorter ones.
it's in the planTake the spacers off, cut the studs shorter and put cap nuts on them.