RCZ front brake callipers fit 407 Coupe?
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Thread: RCZ front brake callipers fit 407 Coupe?

  1. #1
    Member Grayballs's Avatar
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    Default RCZ front brake callipers fit 407 Coupe?

    Can anybody verify if the front brake callipers from the RCZ (4 potters, made by Alcon Brakes UK) will fit onto the hub assembly of the 407 Coupe? I believe that the RCZ discs are 340mm dia (same as my previous 2010 Coupe) but the discs on my 2008 Coupe are 330mm dia. Both cars have 18in wheels, but I am not sure if the rim dimensions and offsets etc are the same?
    This is a bit whimsical perhaps, and I am not even sure I would even go through with it if it is possible, but I'm certainly a bit curious about it, if anyone knows?

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    1000+ Posts dmccurtayne's Avatar
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    The Alcon rotors are 380mm and run very tight on most 18s the offset of the mounting for the calliper is different as well I found that on my x7 c5 308gti ones fitted but I hated the 19s I needed to run them


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    Member Grayballs's Avatar
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    I wasn't thinking so much about the rotors - I now see that the RCZ initially had 302mm rotors - then 340mm on the facelifted model (like my first 407) Also, the earlier version RCZ had the 18in wheels, like the 407, so that got me wondering. i also wondered if there was some common componentry across the vehicle range (ie the hubs, in this case), particularly where wheel sizes and discs are similar sizes? Just to clarify, are you saying that the GTI calipers could actually fit as far as being able to bolt directly on to the C5 hub assembly, but it was an issue of the offset/alignment to make them fit over the disc, or was it a matter related alignment to the the 18in wheels? Cheers!

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    1000+ Posts dmccurtayne's Avatar
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    The gti Alcon 380mm fit on a c5 (same as 407) with 19 the rcz with the 380mm rotors had 19 but these are different part numbers ,
    The issue was that the 18 wheels had a clearance of less than 5 mm so I gave up also not all wheels are the same size inside so its a bit of a mine field Im looking at selling my 19s off my c5 but two will need straightening


    Garage C5 X7 3008 XTE
    Gone but not forgotten 206 GTI 180 306 XR SED 405 MI16 x2 xzara VTS 406 SV 206 XT Berlingo 2011 (best car ever) 306 HDI 307 XSE HDI touring
    Fix it right the first time

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    Member Grayballs's Avatar
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    Interesting to learn about, but waaaay too much trouble for me to even think about pursuing. Out of curiosity, for all your effort, how much of an impact did the GTI discs/caliper conversion make to the braking performance? Cheers

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    1000+ Posts dmccurtayne's Avatar
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    Not really noticeable probably less fade if I pushed it


    Garage C5 X7 3008 XTE
    Gone but not forgotten 206 GTI 180 306 XR SED 405 MI16 x2 xzara VTS 406 SV 206 XT Berlingo 2011 (best car ever) 306 HDI 307 XSE HDI touring
    Fix it right the first time

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