I've got HARDRACE lower control arms to go on my V60.
I'm not sure if XC60 are different but could be due to ground clearance.
Get Volvo ones to suit xc60, the workshop I go to tried Meyle ones and they failed within a few weeks on the shop guys wife's v70t6.......He put Volvo ones in and all fine.
Berry Motor Group.
Talk to Mark 03 9874 5544