I mean i have EBC red stuff pads and brembo rotors on my 4.4, still makes that sound, my 4.8 makes it as well and thats OE stuff all around. It's alot of weight to stop. I don't know if changing to different pads with a different material will help you. I had ceramics on my 4.4 for a while and it still made that noise.

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2011 E70 50i M Sport