The reason they are expensive is they are made from titanium. Very light and strong. If you have. CCBs and light weight wheels (I had FIs) it is the last thing you can do to reduce unsprung weight, further helping handling.
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Current: '16 GT4
Past ///Ms:
'13 F10 M5, Alpine Weiss III/Sakhir Orange Full
'10 E60 M5, Space Gray/Black
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