D2-123 Girodisc Mercedes 360mm Rear Replacement Rings

These Girodisc D2-123 rear replacement rings are sold in pairs with hardware and are engineered to bolt to existing Girodisc aluminum hats (rings only). Not compatible with OEM or third‑party hats.

Vehicle Fitment

• Mercedes-Benz C63 AMG Black Series (W204) 2012 – Rear (for Girodisc 360 mm kits)

Design & Performance

High-carbon iron rings with 48 curved internal vanes draw cooling air through the rotor. Floating two-piece construction reduces unsprung weight while reusable aluminum hats allow ring-only replacement.

Features

• Replacement rings only; reuse your Girodisc rear hats
• Supplied with replacement floating hardware
• High-carbon iron, slotted; directional internal vanes
• Built for repeated heat cycles in street/track use
• For Girodisc 360 mm rear kits on the listed model

D2-123 Girodisc Mercedes 360mm Rear Replacement Rings FAQs:

Are these specific to the Black Series? Yes—this ring kit is confirmed for the 2012 C63 AMG Black Series with Girodisc 360 mm rear hats.

Do they change brake balance? No. Rings maintain OEM geometry when paired with the matching Girodisc hat.

What’s included? Left and right slotted rings, new drive pins/spring hardware, and instructions.

When should rings be replaced? When at or below minimum thickness, or if thermal cracks propagate to an edge.

Related Products

• A1-308 Girodisc Mercedes 360mm Front Rotors
• A2-148 Girodisc Mercedes 360mm Rear Rotors
• D1-308 Girodisc Mercedes 360mm Front Replacement Rings
• D2-123 Girodisc Mercedes 360mm Rear Replacement Rings