Thanks Gilles. I'll make sure I have new one in there when I swap the rack for a rebuilt one.
The brake swap story starts to turn out into a bigger project (I wonder how many times that happens..
). So the brake line left to right didn't want to let go of the hose. Even with the flare wrenches the nut got rounded, so even if I would get it off, it won't be re-useable. Checked how to get the line out, but really see no other option than dropping the subframe.
So whilst I drop het subframe, it makes sense to do the steering rack at the same time. That means moving to the electric pump also. That needs to function, so the electrics also need to be done. It looks like the clips for the coolant hoses / pipes are accessible with the subframe in place, but there is so much space once it is out.... makes sense to use this time to drop in the S coolant pipes with the appropriate hoses. And with the ARB out, this needs either an upgrade or new bushings.
On to the ARB. I found a post on this forum with a list of diameters:
https://986forum.com/forums/boxster-general-discussions/13937-sway-bar-size.html
However, is this a US list, or is RoW the same? I know there are difference in the springs between US and RoW models for regular as well as sport suspension. It could be the same for the ARBs?
Right now I have a 23.6mm front bar on it and a 18.6mm rear. It is a combination that according to the list should not be on my car (97 base with std suspension). Whilst I have upgrade springs and dampers to M030 RoW, it seems most logical to do the same with the ARB. But why is the S different than the base?