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      07-17-2012, 10:04 PM   #8
paradocs98
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Drives: 2014 991 Carrera S
Join Date: May 2009
Location: NY

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Hey there--it may be due to lack of bedding as suggested above. If you only had 500 light miles on them, they might not have ever achieved proper mating between pad and rotor for the demands of track driving. StopTech has great info about why bedding (or "burnishing") is important and how to do it:

http://www.stoptech.com/technical-su...ake-pad-bed-in

http://www.stoptech.com/technical-su...-system-bed-in