SKU: A2-282
GiroDisc 2021+ BMW M2/M3/M4 G8X 370mm Slotted Rear Rotors
GiroDisc slotted rear rotors deliver direct replacement braking for 2021+ BMW M2 G87, M3 G80, and M4 G82/G83 models. These 370mm x 24mm two-piece rotors reduce unsprung weight by 4.8 lbs per corner compared to OEM while enhancing heat dissipation and pad bite. Pair them with performance pads for consistent stopping power on street or track.
Key Features
- Slotted Friction Surface: Narrow slots clear gases and debris for progressive braking feel and reduced fade during hard use
- Two-Piece Construction: 6061-T6 aircraft-grade aluminum hat with high-carbon cast iron ring floats to handle expansion and cut rotating mass
- Weight Reduction: Each rotor saves 4.8 lbs over stock 370mm OEM for quicker acceleration, sharper handling, and less rotational inertia
- Corrosion Resistance: Hard anodized aluminum hat stays rust-free unlike steel OEM designs even in wet conditions
- Replaceable Rings: Friction rings bolt to hat allowing cost-effective service without full rotor replacement
Product Notes
- Sold as pair for left and right rear installation
- Bed-in rotors with 10-15 hard stops from 60-10 mph after install
- Heavy item ships via ground freight in double-walled box
Installation Notes
- Professional installation recommended.
- Bolt-on replacement using factory caliper hardware and no modifications needed
- Compatible with OEM or aftermarket rear calipers on G8X platform
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2023-2024 | BMW | M2 | All |
| 2021-2024 | BMW | M3 | Base |
| 2021-2024 | BMW | M3 | Competition |
| 2021-2024 | BMW | M3 | Competition xDrive |
| 2021-2024 | BMW | M4 | Base |
| 2021-2024 | BMW | M4 | Competition |
| 2021-2024 | BMW | M4 | Competition xDrive |
| 2022-2024 | BMW | M4 Convertible | Competition |
| 2022-2024 | BMW | M4 Convertible | Competition xDrive |
Why Choose GiroDisc?
- Hand-built in USA with racing pedigree in GT3 and endurance series
- Precision machined for perfect balance and zero runout
- Durable design proven over 20+ years in high-performance applications
Frequently Asked Questions
- Q: Will these rotors fit 2021+ BMW M3 Competition xDrive G80?
A: Yes, A2-282 rotors are direct fit for all G80 M3 variants including xDrive models with 370mm rear brakes - Q: What material is used in the rotor ring?
A: High-carbon 72-series cast iron ring paired with 6061-T6 aluminum hat for strength, heat resistance, and light weight - Q: What warranty covers these rotors?
A: Lifetime warranty on aluminum hats against cracking or warping. 12 months on friction rings with proper bedding
Shipping & Handling
- Method: UPS Ground or FedEx Ground
- Availability: In stock – ships same or next business day
- Packaging: Securely packed in 20x18x8 inch double-walled box
- Weight: 28 lbs per pair
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