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Old 04-22-2012, 03:58 AM   #4
Registered User
Join Date: May 2011
Location: UK
Posts: 217
My Ride: 330Ci Clubsport
Nice work, I take it you are using 330 discs? Or are they your originals?
You could use 330 discs but be sure to compare the minimum thicknesses of 330 vs M3.

I've been wondering about this for a while: do the M3 calipers have different connections to the brake hose? I have Goodridge SS hoses and would hopefully re-use them if I did this type of swap. The other problem I could forsee was that if the connection to the caliper is different, you may try M3 hoses but then the connection to the hard lines may be different

Steifan, I checked your sizes against ETK, I only found one minor error. I also added some other models for reference.

F: 286x22 R: 276x19 (solid)

323 Ci cabriolet, 328i/Ci, 325i/xi/Ci (solid)
F: 300x22 R: 294x19

330i/Ci (solid/perforated)
F: 325x25 R: 320x22

M3 (perforated)
F: 325x28 R: 328x20

M3 competition package (perforated)
F: 345x28 R: 328x20

M3 CSL (perforated)
F: 345x28 R: 328x20
'04 330Ci Clubsport | Estoril Blue | 6MT | Black Leather/Silver Cube
Turner Motorsport | Ground Control | Stett Performance | Moroso | Powerflex | Meyle HD | Goodridge
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