P30 front brake rotors: reusing the hats
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2012 C63;1971 280SE 3.5(Sold);2023 EQS 450 SUV 4 Matic (Wife's)
I don't think you can buy the discs separate from the hats at the dealer. I think you are out of luck. You can buy aftermarket discs but I am not sure they will fit the OEM hats.
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FF. W212 E63 M156 non-pano 18" P2 ParkT NightV (gone but will be missed).
I wonder what's the reason for not allowing the reuse of the hat. One of the advantage of such is the hat reusage. I wonder if Brembo will sell just the disc since they are the ones who make them.
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From: eNyCe
Steel Grey Metallic C63!!
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C63 AMG
I did the front Brembos on my M5 whille reusing the hats, about 4 years ago. It's a little time-consuming and you'll need a 3/8" torque wrench (you won't believe the low torque value specified for assembly of the clips) but easy work. I suspect that a little poking around will unearth the part numbers for just the replacement disc.
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C63 AMG P30 *EuroCharged*| Porsche Cayenne | Buell XB9SX
thanks for the responses. i've sent an email to brembo inquiring about purchasing the disc only. i'll update this thread with any info i find.
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C63s Cabriolet, BMW M4, Civic
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From: Battle Ground WA
C63AMG, NIssan NX2000, Pontiac Fiero GT
This week I searched for rotor ring replacement of C 63 front. On racingbrrake.com a whole series of rings come up, but the site puts the onus on the owner to select the proper one. The search words "C 63" on that site brought pn 34041-311K-01 , 355 mm. I realized I failed to measure disc dia and hat bolt circle last opportunity, so cannot react to that pn. I sent an email which has not been answered. I'm resting now. Maybe more later. 
