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      06-18-2017, 09:13 PM   #6
socale39
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Drives: 04 545i SMG
Join Date: Jan 2011
Location: California

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Ah ok. I was reading it differently. Unfortunately I think your option is to go full Brembo BBK or stick with stock. Going with 4 piston setup in the rear will inevitably change the braking bias therefore requiring a different proporting valve. Of course if the fluid displacement is the same you might be ok but These are things to consider.
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