[andrey_gta]

Originally Posted by PixelVogue

Thanks for JVB for point to this thread.....

Hi all,

my brothers got my old BBK setup which was for my 130i E81 which I never fitted to my car but only to realise that the rears are different fitting for the sodding E82 125i

This is the right place for this.

- The rear discs are different so guess they can be changed?

If you have e81 rear BBK caliper and rear BBK disk, then all you need is a e81 Hub on the e82. Also by BBK I think you mean BMW performance 4 caliper kit for 130i.

- Rear caliper not fitting as the mounting hole bolts aren't long enough? (going on what he told me)

I dont think this is an issue. If this is my original post has a link to a Z4 forum where someone has a part number for a long Bolt

- Hand brake shoe wont fit? can be modded?

130i handbrake shoes are large diameter. 125i brake shoes are small diameter. So they don't work.
The solution is one of 3 choices - I will edit here later to explain ( enlarged 125i 128i brake shoes, custom fit 130i/135i brake shoes with welded piece, e46 m3brake shoes)

Looking at the first post which Part numbers would he need to fit the Performance calipers on the rear?
Any help would be great

BMW perf calipers is what you referred as BBK above?
If so all you need is
2x 130i Hub
2x new 125i rear bearing cuz it will be damaged on install.
Handbrake solution

OR if you want new rear rotors, it is just this:
2x 135i rear rotors
Handbrake solution

both solutions will have you bend back/ cut the rear dust shield a bit