GiroDisc GiroDisc 2020+ BMW M3/M4 (G80/G82/G83 w/Carbon Ceramic Brakes) 2-Piece 380mm Slotted Rear Rotors
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GiroDisc 2020+ BMW M3/M4 (G80/G82/G83 w/Carbon Ceramic Brakes) 2-Piece 380mm Slotted Rear Rotors

GiroDisc
GIRA2-322
A2-322
Brake Rotors - 2 Piece
3 Units In Stock - Ships Next Business Day
$ 1,350.00
$ 1,350.00

SKU: A2-322

GiroDisc 2020+ BMW M3/M4 (G80/G82/G83 w/Carbon Ceramic Brakes) 2-Piece 380mm Slotted Rear Rotors

Replace the factory 380mm carbon ceramic rear rotors on 2021+ BMW G80 M3 sedans, G82 M4 coupes and G83 M4 convertibles with these Girodisc 2-piece slotted iron rotors. These fully floating assemblies bolt directly into place using stock carbon ceramic calipers and iron pad shape with no modifications needed. High-carbon iron rings with 72 curved vanes deliver consistent cooling during track or street use while the reusable aluminum hats reduce rotating mass.

Key Features

  • 2-Piece Floating Design: Separates the high-carbon iron rotor ring from the 6061-T6 aluminum hat for reduced unsprung weight and easy ring replacement with D2-322 rings
  • Advanced Cooling: 72 curved internal vanes function as a centrifugal fan to draw air through the rotor for sustained performance under repeated hard braking
  • USA-Made Construction: Hats, rings and drive pins produced in-house in Bellingham WA from domestic materials with cadmium-plated steel pins and black anodized finish
  • Street and Track Ready: Spring clips and Belleville washers ensure zero rattle or noise while allowing axial and radial float for even pad wear
  • 380mm Slotted Surface: Precision slots clear gases and debris for shorter stopping distances and fade resistance matched to BMW G8x carbon ceramic calipers

Product Notes

  • Sold as a pair with factory iron pad shape required, contact for pad recommendations
  • Replace rings at 26mm minimum thickness or if cracks reach the edge
  • Heavy item, secure packaging protects during transit

Installation Notes

  • Professional installation recommended.
  • Direct bolt-on swap, no caliper or hub changes needed
  • Compatible with OEM hardware, torque to factory specs

This Part Fits

Year Make Model Submodel
2021-2024 BMW M3 G80 Sedan (w/ Carbon Ceramic Brakes)
2021-2024 BMW M4 G82 Coupe (w/ Carbon Ceramic Brakes)
2022-2024 BMW M4 G83 Convertible (w/ Carbon Ceramic Brakes)
2022-2024 BMW M4 CS G82 (w/ Carbon Ceramic Brakes)

Why Choose GiroDisc?

  • Proven in racing with direct OEM replacements for BMW performance models
  • Custom high-carbon alloy withstands extreme heat cycles longer than stock
  • Every component crafted and assembled in USA facility for exact fit

Frequently Asked Questions

  • Q: Will these fit my G80 M3 with carbon ceramic brakes?
    A: Yes, A2-322 rotors are a direct replacement for 380mm rear CCB on 2021+ G80/G82/G83 M3/M4 models using factory calipers and iron pads
  • Q: What materials are used in construction?
    A: Rotor rings from proprietary high-carbon iron castings, 6061-T6 aluminum hats with black anodize, high-strength cadmium-plated steel drive pins
  • Q: How do I maintain or replace parts?
    A: Inspect thickness regularly, replace rings at 26mm or cracks, reuse hats with new D2-322 rings, no special tools beyond standard rotor service

Shipping & Handling

  • Method: UPS Ground or FedEx
  • Availability: In stock - ships same or next business day
  • Packaging: Secure individual boxing per rotor, pair ships in oversized carton 24x16x8 inches
  • Weight: 28 lbs per pair

Request For Information

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