P030 front rotor upgrade




I stumbled on a pair of 390mm 2-piece rotors that were on clearance for only $1218. Being they list for over $1000 each I decided to jump on the last pair (part number for rotors 230 421 0912).
Despite my best internet hunting I couldn't find the taller caliper bracket, so I'm having my machine shop fabricate caliper spacers to accommodate for the larger diameter rotors.
I also just order longer mounting bolts to be used with the spacers.
I'll post some pics once I get started. I'm pretty much doing the same upgrade that JHM offers for their RS4 380mm rotor upgrade (see pic).
Last edited by Tech-Tune; Jun 12, 2013 at 08:10 AM.




On a side note, the company I purchased the rotors from have one more set in stock at the same price.
If anyone is interested I can PM you the link.
We are glad to be the sponsor of this forum and offer the most comprehensive brake upgrade for your Mercedes including CLS55 & CLS63:
http://www.racingbrake.com/category-s/7136.htm
The CLS55 (05-07) has the same front as C63 (non black series):
Front (360x36mm):
http://www.racingbrake.com/Two-piece...ONT-p/2141.htm
Same front rotors for CLS63 (07-12), but for sports package (P030) the size increased to 390x36mm which is the same as C63 black series:
http://www.racingbrake.com/Two-piece...ONT-p/2237.htm
The rear has been the same for all years and models (both CLS55 & CLS63)
http://www.racingbrake.com/Two-piece...EAR-p/2188.htm
These rotors are made with the most advanced braking technology in design and metallurgy, they are light weight and built for lasting performance and guaranteed to improve your braking performance.
We will match any advertised prices including dealer's close out price on first first set of order so he can post a review on the weight saving and the benefit from the driving and handling improvement.
Let us know if you have any questions.




To be honest I could care less... I got them for a great price.

Rotor's diameter are a hair less than 15" (which makes them 380mm, not 390mm) and weigh 28.5lbs each. I'll weigh the stock ones once their off the car.
Waiting just waiting on the bolts and spacers.
Last edited by Tech-Tune; Jun 12, 2013 at 05:18 PM.
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I installed one set of perf pads but didn't have time to test it properly so can't tell what difference.
btw, if you'll ever decide to upgrade rear discs, I have one left 360mm from sl65




BTW, my TB gave me a few issues in the beginning, but I raised the idle (via star) and Jerry revised the file and now it runs perfectly.
Last edited by Tech-Tune; Jun 13, 2013 at 07:43 AM.
or the fitment wouldn't work.
hope to finally find the time to fit all that and, if it will work, that rotor could go and I'll tell you.
now it's just among all my toys
..it's a 360x26mm, weighs exactly 10.560gr, hand brake bell and everything included.
ps: sometime I think at that tb... just beause went crazy finding all parts for mine that wouldn't want to remove it. except, if HP difference is great enough but that's not clear.
so, you had to fit a new bigger butterfly valve .. and you have a stock or 80mm snout ?
Last edited by dyno; Jun 13, 2013 at 08:19 AM.
I've searched high and low and with every industrial bolt supplier I can find and the right size in the right thread can't be found anywhere as far as I can find. you really should use a high grade bolt for these, especially since on top of it you are spacing them too which will add even more stress, also your spacers need to be fairly precise, don't just stack some washers. the bolts you show here don't appear to be a high grade bolt but I can only tell so much from pics... you should be careful about just using any bolt that just fits, these really need to be high grade hardware




part number: 91292A222 or 91303A288
website: http://www.mcmaster.com/#socket-head-cap-screws/=n6izbp
Last edited by Tech-Tune; Jun 13, 2013 at 08:47 PM.




I used a 10mm hex to remove mine. Are you sure yours are M12's?




Gonna mock everything up over the weekend to make sure the measurements I took were accurate. I'll post some before and after pictures once I get started.




Here's a few before and after pics, though the 20" wheels still make the 380mm rotors look small.
I just ordered some new AMG logo stickers because the previous owner of the car put these on crooked.
Last edited by Tech-Tune; Aug 7, 2013 at 10:19 PM.




Was thinking the SL P030's might fit but would like to make certain before purchasing.



Good luck !