italy3541 :
Some more infos for updating the first post:
E8x 135i/ E8x/E9x PP 338x26 mm with 6-piston calipers -> there are 2 versions available.
This brake would be not legal for Germany/Europe for the 35i/35is-types, because the discs are smaller than the original discs
1. E82 135i: No perforated discs and grey calipers:
6-piston calipers grey: 34106860143 + ...44
6-piston calipers grey: 34106786059 + ...60
brake pads: 34116786044
brake discs 338x26 mm (not perforated): 34116778647
dust cover: 34106780216 + ...15
I don't know why there are 2 different caliper types available?
2. E8x/E9x Performance upgrade:
6-piston calipers yellow: 34116786741 + ...2
brake pads: 34116786044
brake discs 338x26 mm (perforated): 34116786392
The calipers of the brakes are interchageable, as well as the discs.
F2x/F3x 340x30 mm/ 370x30 mm
You have 2 different p&p upgrades:
1. 340x30 mm discs with 4-piston-calipers (for 17" wheels):
This brake would be not legal for Germany/Europe for the 35i/35is-types, because the discs are smaller than the original discs
1.1 335i brakes:
4 piston calipers: 34116850931 + ...2
discs 340x30 mm (not perforated): 34116792223
brake pads: 34116859066
1.2 335i M-Sport brakes:
4 piston calipers: 34116799469 + ...70
discs 340x30 mm: 34116792223
brake pads: 34116859282
I think the difference in the caliper-p/n's are the colors of the calipers.
The M-brakes should be painted blue and the normal brakes one is unpainted/ grey (but this I don't know by 100%).
2. 370x30 mm discs with 4-piston-calipers (for min. 18" wheels):
4-piston-calipers yellow: 34106855475 + ...6
4-piston-calipers red: 34106855477 + ...8
4-piston-calipers orange: 34106855479 + ...80
discs 370x30 mm (perforated): 34106797603
dust cover: 34116792237 + ...8
brake pads: 34116859066
Calipers from 340mm and 370 mm are similar in general, but have other mounting points and brackets because of the bigger discs of the Performance brakes - not interchangeable!
Pads should be interchangeable from shape.
The 370 mm BMW Performance brakes are the better solution for upgrading the Z4 than the 340 mm and the only possibility for Europe to get a legal p&p solution for the 35i/35is.
F8x M3/ M4:
Calipers from 340 mm F30 brakes with 380x30 mm discs. To fit them to the Z4 you probably need adapters or you have to adapt the M4 swivel carrier (31212284001 + ...2) to the Z4. I guess adapter brackets would be the more simple soultion:
4-piston-calipers: 34116799469 + ...70
Discs: 380x30 mm (perforated): 34112284809 + ...10
Dust cover: 34112284743 + ...44
M-brake pads: 34112284765
ALL INFORMATION AND P/N's WITHOUT ENGAGEMENT
Further solutions:
I am working with a friend on two other brake solutions at the moment using oem parts - bigger ones than the previous mentioned
We are also working on a solution for the rear brakes with oem parts, but there we are not 100% sure yet.
Updates on these solutions coming soon...