17.8.D
Addition or replacement of suspension stabilizers (linkage connecting
axle or de dion to the chassis which controls lateral suspenion
location) is permitted. .....methods of attachment and attachment
points are unrestricted.

Does this mean that control arms are replaceable? They control the
lateral location of the suspension......

Like the adjustable ones in the vendors forum?

I asked this over on SCCA forums...and the end result was that it is illegal.....because of the adjustability...so I didn't pursue it..

they're legal in SM though, so I'm still interested. ;)