If you are thinking of "up grading" your front disc on any 5 or 6 series, don't waste your money. I have done this on both a 535 and 645 and they will "react" to the change, and not for the better. The front suspension set up on both these models are designed to take only Original Equipment (OE). If you want to improve your braking, change your pads, I have spent a fortune in trying to resolve this. Hope this saves you the time and money!!
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