These KW coilovers were on a westfield when I  bought it 2 years ago, they seem I ok condition good damping etc, from what iv read they are rebuildable not that they need it. I also believe they are double adjustable bound and rebound , 2 of them have 50 n/mm springs and 2 have 60n/mm springs  . One pair are 280mm closed 305mm open length, and one pair is 285mm to 325mm. The mountings are 37mm wide and take a 7/16ths bolt  the main damper rods are 18mm springs 170mm long and the main body is 52mm this item is only for UK buyers I won't ship over seas