SS and SS+

Front Bar:
One 16mm 31 35 6 757 071 w/ bushing 31 35 6 757 069
One or Cooper with SS 22.5mm 31 35 6 757 072 w/ bushing 31 35 6 757 146
Cooper or MCS with SS+ 24mm 31 35 6 758 301 w/ bushing 31 35 6 758 302

Rear Bar:
One none
One or Cooper with SS 16mm 33 55 6 754 818
Cooper or MCS with SS+ 17mm 33 55 6 754 819
same bushing for SS and SS+ rear bars

Struts:
One (standard suspension) - 31 30 6 759 243/244 (F=...243/R=...244)
One or Cooper with SS 31 30 6 759 245/246 (F=...245/R=...246)
(Cooper or MSC with SS+ 31 30 6 759 247/248 (F=...247;R=248)

Springs

For the One, depending on overall weight, with standard suspension:
31-33-6-756-641 or -642 front
33-53-6-756-652 or -653 or -654 rear

One with sport suspension:
31-33-6-756-646 or -647front
33-53-6-756-657 or -658 or -659 rear

For the Cooper with SS : (choice depends on vehicle weight with options chosen)

31-33-6-756-645 or -646 or -647 front
33-53-6-756-657 or -658 or -659 rear (in usa only -658 or -659)

For the Cooper with SS+ : (choice depends on vehicle weight with options chosen)

31-36-6-758-310 or -311 or -312 front
33-53-6-758-354 or -355 or -356 rear

For the Cooper S : (choice depends on vehicle weight with options chosen)

31-36-6-758-311 or -312 front
33-53-6-758-356 or 379 rear


From: http://www.mini2.com/forum/showpost.php?p=730037&postcount=2