MMX 2-piece 370mm floating rear discs and rotors for BMW F8x M2, M3, M4
Upgrade your BMW M car braking with MMX 370mm x 24mm 2-piece floating rear brake discs and rotors. Designed specifically for BMW F8x platforms, these performance rear discs run up to 30 percent cooler than OE and increase cooling efficiency by up to 30 percent for stronger, more consistent stopping power on fast road and track day use.
Built to match the MMX front replacement discs, they feature matching grooves and matching performance for a balanced brake upgrade front to rear. The two-piece floating design allows the disc ring and aluminium hat to expand radially and axially under heat, significantly reducing the risk of warping and cracking often seen on single-piece discs. Thanks to this efficient construction, MMX discs last considerably longer than factory discs while delivering improved pedal feel and reduced fade.
Why choose MMX 370mm rear brake discs for BMW F8x M cars
- 370mm x 24mm 2-piece floating rear discs and rotors for BMW F80 M3, F82 M4, F83 M4, F87 M2
- Up to 30 percent cooler than OE and up to 30 percent more cooling efficiency
- 36 directionally curved vanes that pump air through the rotor for rapid heat dissipation
- Left and right-hand specific rotors to optimise airflow and cooling
- Grooved friction surface increases initial bite, improves brake feel and deglazes pads
- 6061-T6 aircraft-spec aluminium centre hat for strength and thermal stability
- Proprietary rotor alloy engineered to withstand extreme braking temperatures and hold form
- Direct rear replacement for OE discs, compatible with factory calipers on F8x models
- Use with OEM pads or aftermarket performance pads for fast road and track
- Designed to pair with MMX front discs for a complete performance brake upgrade
Performance benefits
- Improved cooling and reduced fade during spirited driving and track days
- More consistent pedal feel and stopping performance lap after lap
- Reduced risk of warping and cracking compared to single-piece discs
- Longer disc life in real-world conditions
How the cooling works
Internal directional vanes draw cool air from the centre of the disc and force it outward as the rotor turns. This pumping action rapidly moves heat away from the friction surface. Unlike OEM one-direction discs, these MMX rotors are handed left and right to maximise airflow and keep temperatures stable for consistent braking performance.
Fitment and compatibility
BMW F8x platform rear brake discs and rotors, including:
- BMW F80 M3
- BMW F82 M4
- BMW F83 M4 Convertible
- BMW F87 M2 and M2 Competition
Please check your existing rear disc size is 370mm x 24mm before ordering if unsure.
Fitting and support
Professional fitting recommended. Nforcd offers installation and setup in Warwickshire. For a fitting quote or advice, contact Sales@nforcd.com.
What our customers say
We have fitted and run these MMX 2-piece 370mm rear discs on our own F8x cars and for customer builds. Feedback has been consistently positive, highlighting stronger bite, better pedal feel and reliable fade resistance with OEM pads on fast road, and excellent stability with performance pad compounds on track.
SEO and search terms
BMW F80 M3 rear brake discs, BMW F82 M4 rear brake rotors, BMW F87 M2 rear discs, F8x rear brake upgrade, 370mm rear rotor upgrade, two-piece floating rear discs, grooved rear rotors, performance brake discs BMW M3 M4 M2, track day brake upgrade, rear brake rotors F80 F82 F83 F87, MMX rear discs 370mm, BMW M2 Competition rear discs.




