D1-123 Girodisc Mercedes 390mm Front Replacement Rings
Maintain the uncompromising stopping performance of your AMG with Girodisc D1-123 390mm front replacement rings. These precision-engineered rings are designed as direct replacements for Girodisc’s two-piece systems, bolting to your existing aluminum hats using the supplied floating hardware kit. Each rotor is machined from Girodisc’s proprietary high-carbon cast iron to deliver outstanding heat control, consistent braking feel, and fade resistance in both spirited road and track use.
Vehicle Fitment
Compatible with:
• Mercedes-Benz C63 AMG (W204, 2008–2015)
• Mercedes-Benz E63 AMG (W212, 2010–2016)
• Mercedes-Benz CLS63 AMG (C218, 2012–2017)
• Mercedes-Benz S63 AMG (W222, 2014–2017) – Iron rotor conversion
Note: Designed for Girodisc 390mm two-piece front rotor systems. Not compatible with OEM one-piece or carbon-ceramic discs.
Features
• Sold as a left/right pair with complete floating hardware kit
• Direct replacements for Girodisc 390mm two-piece front rotors
• CNC-machined from high-carbon iron alloy for superior heat resistance
• Directional curved vanes maximize airflow and cooling efficiency
• Maintains factory brake bias, ABS, and ESP calibration
• Precision-balanced to eliminate vibration and maintain pedal feel
• Designed exclusively for Girodisc aluminum hats
Specifications
• Diameter: 390 mm
• Position: Front
• Material: High-carbon cast iron
• Mount type: Floating two-piece system
• Includes: Two rotor rings and hardware kit
• Sold/priced per pair
Girodisc D1-123 Mercedes 390mm Front Replacement Ring FAQs
Can these fit the factory AMG rotor hats? No. The D1-123 rings are designed exclusively for Girodisc aluminum hats and cannot mount to OEM one-piece or carbon-ceramic assemblies.
What pad compounds pair best with these rotors? For street and light track use, Ferodo DS2500 or Pagid RS29 pads perform well. For dedicated track work, use Pagid RSL1 or Endless ME20 for optimal friction and fade resistance.
Do these rotors require a specific bedding process? Yes. Perform 8–10 moderate stops from 60 mph to evenly transfer pad material, then allow the brakes to cool completely before hard use.
Are these rotors directional? Yes. Each ring is labeled for left or right installation to ensure proper airflow through the internal vanes for maximum cooling.
Upgrade your AMG’s braking capability with Girodisc D1-123 390mm front replacement rings — engineered for performance, heat control, and reliability under the most demanding conditions.
