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I have the Dinan stage 1 big brake kit (plus Earl braided lines) on my 1990 E34.
I have to pump the pedal to get a solid feel.
The system has been bled several times, and having talked to a couple of brake specialists, they seem to think that the brake master cylinder is only just up to the job.
(the amount of piston area etc is far higher on the large 4 pot compared to the single pot sliding version of the standard setup ?)
Is the M5 brake master cylinder bigger ?
Does it fit easily ?
advice please