MMX 2-Piece Floating Front Rotor Set 380x36mm for G8X BMW M2 / M3 / M4
The MMX G8X M2 M3 M4 2-Piece Front Rotor Set replaces the heavy one-piece factory front discs with a true floating design that runs cooler, weighs less, and shrugs off the warping and judder that hard track use inflicts on stock rotors. The 380x36mm rotor rings float on separate hats so the ring can expand radially and axially as it heats, and the larger directional cooling vanes inside the casting improve cooling efficiency by up to 30% versus OE. The result is lower peak temperatures, less fade across consecutive hard stops, and a pedal that feels the same on the last session of the day as it did on the first.
Features
- 2-piece floating disc design (rotor ring + separate hat) eliminates the internal stress that warps one-piece rotors
- Up to 30% improvement in cooling efficiency versus the OE disc thanks to larger directional cooling vanes
- Lighter than OEM, reducing unsprung and rotating mass for sharper steering response
- J-hook style slotted face evacuates gas and pad material without the cracking risk of drilled iron
- Supplied as left- and right-handed directional units so vane geometry always matches rotation
- Direct bolt-on, no caliper, bracket, or pad changes required
- 1-year manufacturer warranty against defects in materials and workmanship
G8X M2 M3 M4 2-Piece Front Rotor Specifications
- Dimensions: 380mm x 36mm
- Construction: 2-piece floating (rotor ring + separate hat)
- Rotor face: Slotted (J-hook style)
- Cooling: Directional internal vanes, up to 30% more efficient than OE
- Sold as: Left and right front pair
Applications
- BMW M2: G87 | 2023 to present
- BMW M3: G80 | 2021 to present
- BMW M4: G82, G83 | 2021 to present
Notes
- Factory iron brakes only. Cars equipped with factory carbon ceramic brakes (CCB) cannot use this rotor as a direct bolt-on.
- Pairs with the matching 370x24mm rear rotor set (MMR30-1602R) for a full-axle upgrade.
- For an iron-to-CCB conversion, see the MMX carbon ceramic front rotor (MMR30-1603F).
Frequently Asked Questions
Do I need different pads or calipers?
No. The G8X M2 M3 M4 2-Piece Front Rotor set bolts on with no caliper, bracket, or pad changes required.
Why a floating 2-piece design?
A floating ring expands freely under heat instead of fighting against itself like a one-piece rotor. That dramatically extends pad and rotor life and keeps pedal feel consistent under repeated heavy braking.
Why slotted instead of cross-drilled?
On iron rotors, slots evacuate gas and pad material without the surface-cracking risk that aggressive cross-drilling introduces.
Are the rotors directional?
Yes. Each set is supplied as left- and right-handed units so the internal vane geometry is always optimized to the direction of rotation. Verify orientation before installation.
Will these fit a car with factory carbon ceramic brakes?
No. This set is a direct replacement for the factory iron brake setup only.
Should I do the rears at the same time?
For balanced thermal behavior front to rear, we recommend pairing with the matching 370x24mm rear set (MMR30-1602R).
About MMX Performance
MMX Performance is a UK-based specialist in performance parts for BMW and MINI vehicles, crafting high-quality upgrades that blend precision engineering, rigorous testing, and motorsport heritage. Driven by enthusiast culture, MMX designs its products in the UK, often putting them through track validation, to ensure durability, fitment accuracy, and on-road performance. Their catalog spans drivetrain components, spacers, hardware, and chassis enhancements, all tailored to elevate both the driving experience and visual appeal of BMW and MINI models.
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