They do but some have said they get a knocking from the BC's while others don't seem to have issues. It was enough to put me off and I bought a B12 kit but for the reasons I said yesterday in your other thread I ended up selling that and fitting B4's with eibachs.
The other thing that put me off coilovers in general on a road car is I know I would be forever fiddling with the settings etc driving myself insane.
I the end I decided I need something to "fit and forget"