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SKU: A1-282
GiroDisc 2021+ BMW M2/M3/M4 (G8X Excl CCM) Slotted Front Rotors
GiroDisc slotted front rotors deliver direct replacement braking for 2021+ BMW M2/M3/M4 G8X models excluding carbon ceramic equipped vehicles. These 380mm x 36mm two-piece rotors reduce unsprung weight by 12.4 lbs per pair compared to OEM while enhancing heat dissipation and fade resistance. Drivers experience consistent pedal feel and shorter stopping distances under repeated hard use.
Key Features
- Two-Piece Construction: 6061-T6 aircraft-grade aluminum hats with high-carbon alloy steel friction rings allow independent expansion to prevent warping and enable easy ring replacement.
- Curved Vane Design: Internal vanes direct air for 20% better cooling than straight vane rotors maintaining lower temperatures during track sessions.
- Slotted Friction Surface: Slots clear gases debris and water for immediate bite in wet conditions and consistent pad contact.
- Lightweight Build: Each rotor weighs 22.5 lbs versus OEM 28 lbs reducing rotational mass for quicker acceleration and suspension response.
- Patented Drive System: Stainless steel buttons provide bob-weight free connection eliminating hat-friction separation common in riveted designs.
Product Notes
- Direct bolt-on replacement uses existing OEM calipers pads and hardware.
- Bed-in rotors per GiroDisc instructions for peak performance.
- Pair weighs 45 lbs ships in one box measuring 40 x 16 x 16 inches.
Installation Notes
- Professional installation recommended.
- Torque hardware to BMW specs during assembly.
- Compatible with OEM M Compound or performance pads no hub-centric rings needed.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2021-2025 | BMW | M3 | G80 Base/Competition/Competition xDrive |
| 2021-2025 | BMW | M4 | G82 Base/Competition/Competition xDrive |
| 2021-2025 | BMW | M4 | G83 Base/Competition/Competition xDrive |
| 2023-2025 | BMW | M2 | G87 Base/Competition |
Why Choose GiroDisc?
- Hand-built in the USA with racing-proven technology from GT3 endurance programs.
- High-carbon steel resists cracking under extreme heat cycles.
- Precision CNC-machined for zero-runout fitment on G8X hubs.
Frequently Asked Questions
-
Q: Will these rotors fit vehicles with carbon ceramic brakes?
A: No this kit fits iron rotor G8X models only excludes CCM-equipped cars. -
Q: What materials are used in construction?
A: Hats from 6061-T6 aluminum friction rings from 4340 high-carbon steel slots fully machined. -
Q: What warranty coverage applies?
A: 12-month defect warranty on hats and rings proper bedding required excludes abuse or racing misuse.
Shipping & Handling
- Method: UPS Ground or Freight for heavy items
- Availability: In stock - ships same or next business day
- Packaging: Secure double-boxed 40 x 16 x 16 inches
- Weight: 52 lbs
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