02-11-2005, 07:25 AM
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#10 (permalink)
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Senior Member
Car: 2005 Chrysler 300C
Join Date: May 2004
Member Number: 166
Location: Grand Rapids, Michigan
Posts: 632
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The OEM manufacturers like Porsche/Ferrari actually cast the holes into the rotors and then just machine them to clean the up. In the aftermarket they add the holes after the casting/forging process. They may disperse heat and reduce gas build up, but they weaken the rotor. II Kings, didn't you put on SS lines? If so what was the source and do you like them?
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