BMW E63 COUPE 635d 650i E64 CABRIO 635d 650i 09/2004-08/2011 FRONT DRILLED GROOVED BRAKE DISCS 348mm. Key Benefits of MTEC Discs. The holes help to keep the discs cool and dissipate heat! The grooves help deglaze the pad and prevent fade which occurs when the pad and disc gets too hot!
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