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I think the copper "colour" is from the coating (archive)

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Posted by R.Mui on August 06, 2001 at 23:19:16:

In Reply to: great response - by the way posted by Ben 88 750il on August 06, 2001 at 21:46:39:

that they put on the rotors to prevent oxidation during transportation and storage of the rotors, no?

The AP Lockheed rotors (cross drilled after the rotors are cast) also look that way before installation. After use they look the same as the original rotors (cast iron).

I believe the Brembo rotors (the floating ones, aka the Porsche kit - not the OEM quality ones) also has holes cast into them in the casting process?


have you seen the BMP cross drilled copper colored ones? Are they a bit tacky?





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