MMX 380mm 2-piece floating front brake discs and rotors for BMW G8x M2, M3, M4 – grooved performance upgrade 380x36mm pair
Upgrade the braking performance of your BMW G8x with MMX 380mm 2-piece floating front brake discs. Designed specifically for the BMW G80 M3, G82 and G83 M4, and G87 M2, these grooved (often called slotted) performance rotors deliver cooler running, stronger initial bite and repeatable stopping power on fast road and track. With up to 30% cooler operation than OE and up to 30% improved cooling efficiency, this direct upgrade reduces fade, improves pedal feel and inspires confidence every time you brake.
Key features and benefits
- 380mm x 36mm 2-piece floating design reduces the risk of warping and cracking compared with single-piece OE discs
- Up to 30% cooler than OE for superior heat management and consistent braking performance
- Grooved friction face increases initial bite and continuously cleans pad surfaces for consistent feel and longevity
- 72 directionally curved internal vanes pump cool air through the rotor for maximum heat dissipation
- Left and right-hand specific rotors optimise airflow and cooling across the front axle
- 6061-T6 aircraft-grade aluminium centre hat reduces unsprung mass and manages thermal expansion
- High-strength rotor alloy withstands extreme braking temperatures while maintaining stability
- Compatible with OEM pads and popular aftermarket performance pad compounds
- Sold as a matched pair of front discs/rotors
Built for G-series M performance
The factory G8x six-piston front caliper is strong, but the OE drilled disc can struggle with heat when driven hard. The MMX two-piece floating architecture allows the disc ring and hat to expand under load, preventing common heat-related issues seen with single-piece rotors. Expect cooler operation, more stable pedal feel and longer component life on spirited road drives and track days.
Real-world results
We have fitted and used these discs on customer G8x cars and our own builds. Feedback is consistently positive: noticeably stronger bite, quicker heat recovery, reduced fade and improved confidence lap after lap. A proven BMW G80 M3, G82/G83 M4 and G87 M2 brake upgrade that retains everyday usability while delivering serious performance when you need it.
Technical specification
- Disc size: 380mm diameter x 36mm thickness (380x36mm)
- Construction: 2-piece floating rotor with aluminium hat
- Vane design: 72 directionally curved vanes for maximum airflow
- Friction face: grooved for enhanced bite and continuous pad surface cleaning
- Hat material: 6061-T6 aluminium
- Rotor alloy: proprietary high-temp, high-strength formulation
- Orientation: left-hand and right-hand specific rotors for optimal cooling
Fitment
BMW G8x platform front axle: BMW G80 M3, BMW G82 M4, BMW G83 M4 Convertible, BMW G87 M2. Direct performance upgrade for OEM 380mm front disc applications.
Pad compatibility and bedding-in
These discs work with the factory pad compound and with popular aftermarket performance pads. Thanks to improved heat dissipation, OE pads perform better in real-world use. For dedicated track days, consider a suitable motorsport pad compound. Always follow an appropriate bedding-in procedure after installation.
Professional fitting and support
Professional installation is recommended. For specialist fitting, choose Nforcd in Warwickshire. Request a fitting quote via Sales@nforcd.com and our team will be happy to help.
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