Originally Posted by TimeAtk
I asked because I have KW sleeves, seeing if GC plates would work
GC makes a specific camber/caster plate for the M3-KW with stock style springs, and not just adapting different parts (e36) to the e9x M3 chassis.
To the best of my knowledge, only the GC kit will work with an M3 spring. They do not raise the car, and allow the caster to be "finely adjusted" rather than needing to bolted and unbolted in a series of holes.