I started with the BAT bar. I bent two brackets and one subframe sway bar mount point was bent (the slotted part where the sway bar bracket tabs go in). In my opininon the subframe should be boxed with anything larger than the stock bars.

George Hodge New: Volvo S60R Old:2000 SVT Silver Frost 1188/2150 DMD, 75mm Pro-M, HPP rear strut tower bar Aussie 24mm sway bar (with boxed in subframe) BAT European Handling Kit, Brullen Y-pipe Performance Ford spherical bearing end links