Those are Special edition 17" wheels for latest x40 volvos 2003-2004 year made by bbs for volvo and very light weight also. I ran these end of 2017 and no problems and no cracks. 16" wheels bbs are more common and these 17" are very rare. Volvo stock color for these was like darker gray and because these are used wheels there was some stone marks on paint and looked no good. Now paint is bbs normal brighter color which i like very much. :)
I did retard exhaust cam 0.5mm for this year to get more aggressive spool and will test it more when summer comes here maybe next month when snow melts. :)
Spool is good and no need for more modern turbo because then engine will brake :D 650nm is maximum torque which it hold in long term. Have driven now 10000km on this engine and no problems :)