I'm selling this nearly new Thule fit kit 161 to install a Thule gutterless rack system on your 850, V70, or S70. I purchased the kit new in 2007 and used it for about three months before selling my 850. I'm still in the Volvo world but I'm back in RWD land so can't use this rack set up anymore. New fit kits run $60 or so from REI or other Thule dealers.
The fit kit allows you to mount your Thule gutterless foot towers (e.g. Aero 400 or 400XT) to your Volvo.