GiroDisc D2-322 BMW G8X M3 / M4 Iron Conversion Rear Replacement Brake Disc Rings
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GiroDisc D2-322 rear replacement brake disc rings renew the friction surfaces of the compatible GiroDisc assemblies fitted to BMW G8X M3 / M4 Iron Conversion. They are intended for an existing 2-piece disc installation with the correct reusable centre bells.
Replacing the cast-iron friction rings lets you retain serviceable aluminium bells while renewing the working disc surfaces. Match the full ring part number and the compatible assembly listed below; similar diameter, appearance or vehicle model alone does not confirm the bell interface.
Key Features
- Replacement cast-iron friction rings for the specified GiroDisc assemblies
- Rear axle applications shown below
- Existing matching GiroDisc centre bells required
- Pair of rings with replacement mounting hardware
Vehicle Fitment and Brake Setup
| Vehicle | Axle | Model years | Required brake setup |
|---|---|---|---|
| BMW M3 / M4 (G8X) | Rear | 2021- | with carbon ceramic; iron-disc conversion application |
These are replacement rings rather than complete brake discs. They require the specified GiroDisc centre bells and must not be fitted to factory or other centre bells unless expressly approved for this exact part number.
Product Specifications
| Part number | D2-322 |
| Brand | GiroDisc |
| Product type | Replacement Brake Disc Rings |
| Axle | Rear |
| Sold as | Pair of replacement rings |
| Centre bells | Existing compatible GiroDisc bells required |
| Hardware | Replacement mounting hardware included |
Recommended Supporting Upgrades
These rings service the matching A2-322 complete disc assembly. Each application uses the correct centre bell for that assembly.
Explore GiroDisc BMW brakes and the complete GiroDisc range for supporting brake components.
Installation and Care
Inspect the retained centre bells before reusing them. Fit the new mounting hardware supplied with the ring kit and follow GiroDisc's ring assembly instructions, including orientation and tightening sequence. Check clearances and complete the required bedding process with suitable pads before using the rebuilt discs.
Contact us to confirm availability and lead time before ordering.
Product images may be illustrative. Use the part number and specifications to confirm the item required.
Product specifications
- Brand
- Girodisc
- Product type
- Replacement Brake Rings
- Part number / SKU
- D2-322
- Vehicle make
- BMW
- Vehicle model
- M3 and M4
- Vehicle variant
- G80, G82, and G83
Warranty: Products are supplied with the applicable manufacturer warranty.
Shipping: We offer UK and worldwide shipping. Delivery estimates are shown above.
Returns: Special-order items may be subject to different cancellation/return conditions.
Klarna payment options are available at checkout where eligible.
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GiroDisc FAQs
Helpful answers before you order. Need more detail? Our team can help.
Which brake specification do I need?
Confirm the axle, fitted caliper and disc dimensions against the listing. Different factory brake packages can be fitted to the same model. If you are unsure, send us your vehicle details and photographs of the current brakes before ordering.
How do I choose between road and track options?
Tell us whether the car is used on the road, for occasional track days or for competition. Check the stated compound or product specification, and any usage restrictions in the listing. We can help you compare the available options for your intended use.
When will my order arrive?
Select your required option and check the live availability message above. Dispatch is when your order leaves us; delivery takes additional time and depends on the service and destination. If no verified lead time is shown, or you need the item for a fitting appointment or event, contact Nineteen72 Performance before ordering.
What is included in the price?
Check the product description, selected option and stated quantity before ordering. Images may show optional equipment or an example installation. If you need a matching pair, a complete kit or additional hardware, ask us to confirm exactly what is included.
How do I get help before ordering?
Contact Nineteen72 Performance with a link to this product and your question. For vehicle-specific parts, include your model, year, engine and any modifications that may affect compatibility.
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