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Is there a BMW NA rotor upgrade available for E53?
A friend of mine mentioned that BMW has upgraded peformance rotors available for his 2004 330 xi, and that he's getting them installed at the dealer next week. Same size dimensions as his original rotors, but supposedly both drilled and cross-slotted.
At the risk of sounding ignorant, are there upgraded rotors available for the E53 directly from BMW? I'm not talking about 3rd party upgrades (i.e. Brembo, etc.) which I know there are plenty out there.
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