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Old 05-27-2011, 03:10 PM
Joe@Bavarian Joe@Bavarian is offline
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Location: Folsom
 
Join Date: Mar 2011
Posts: 430
Mein Auto: Me - E39 5spd, Wife - E36
One thing to look for is the size of the cooling vein area. The larger the cooling area the greater chance of warping. Cheap rotors have a larger vein area so they can use less metal.

I found this picture that shows the difference from a Quality to cheap rotor.
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