MMX Performance F8X 2-Piece 380mm Floating Front Rotors M2 M3 M4
1 IN STOCK
The MMX 2-Piece 380mm Floating Front Rotor Set is the engineered front-rotor upgrade for the F8X M-car family. Designed and tested by MMX as a direct replacement for the OEM iron front disc, this is a true two-piece floating rotor (left- and right-handed specific) built to drop the OEM rotor's heat-induced limitations without any caliper or hub modification.
Each rotor pairs a proprietary high-carbon iron ring with a CNC-machined 6061-T6 aircraft-specification aluminium hat, connected by a floating bobbin system. That floating mount allows full radial and axial thermal expansion as the rotor heats, eliminating the most common failure mode of single-piece OEM discs (warping and surface cracking under repeated heavy braking). The aluminium hat is meaningfully lighter than the OEM cast hub, reducing unsprung and rotational mass at the front axle where it matters most for steering response and ride control.
The friction face is laid out with 72 directionally curved cooling vanes that act as a centrifugal pump as the rotor spins, drawing air through the center of the disc and out through the friction ring. MMX states the assembly runs up to 30% cooler than the OEM disc, which translates directly into less fade on track, more consistent pad release behavior, and longer rotor life across track-day cycles. MMX's signature directional grooves on the friction surface improve initial bite and clear pad gases and debris from the pad face.
This rotor uses the OEM 6-piston front caliper that came on F80 M3, F82/F83 M4, and the original N55-engined F87 M2, and it accepts OEM or upgraded MMX RP650 / RP750 brake pads. It is not compatible with the F87 M2 Competition (silver caliper variant) and is not compatible with the M Carbon Ceramic Brake (CCB) package.
Product Details
- Diameter × thickness: 380mm × 30mm
- True 2-piece floating construction with floating bobbin mounting system
- Proprietary high-carbon iron rotor ring with directional groove pattern
- 6061-T6 aircraft-specification aluminium hat (CNC-machined, anodised)
- 72 directionally curved internal cooling vanes
- SKU: MMR30-1001F
What's Included
- 1× Left-hand 380mm × 30mm 2-piece floating rotor (with floating bobbins pre-installed)
- 1× Right-hand 380mm × 30mm 2-piece floating rotor (with floating bobbins pre-installed)
- Brake pads not included: sold separately
Vehicle Applications
Related Products
Notes
- NOT compatible with F87 M2 Competition (silver-caliper variant). The M2 Competition uses a different front caliper and rotor specification.
- NOT compatible with the M Carbon Ceramic Brake (CCB) package. CCB cars use a carbon-ceramic friction surface and CCB-specific calipers.
- Discs are directional: left- and right-handed specific. Verify orientation before installation.
- Sold as a pair. Pair with MMR30-1002R rear rotor set for a complete F8X rotor refresh.
- Brake pads are sold separately. MMX RP650 (MMR27-1001F) recommended for fast-road and light track use.
- Includes a 1-year manufacturer warranty against defects in materials and workmanship
- Designed and tested in the United Kingdom