MMX 380mm Front Brake Discs/Rotors 2-Piece Floating Grooved/Slotted 380x36mm Pair for BMW G8x M2 M3 M4 (G80 G82 G83 G87) Performance Upgrade

Uprated 380x36 front rotor set for BMW G-series M cars - precision slotted, two piece floating design

Transform how your G8x stops on fast road and track. This MMX 380 mm front rotor pair uses a two piece floating architecture with a lightweight aluminium bell and a high strength ring to deliver serious braking consistency, sharper response and improved heat control. Designed as a direct fit with the factory 6 piston caliper on BMW G80 M3, G82 M4, G83 M4 Convertible and G87 M2, these slotted rings give confident bite and stable pedal feel session after session.

Why this upgrade works

• 380 mm diameter x 36 mm thickness for OE fit with a meaningful thermal buffer under hard use
• Floating rotor on an aluminium hat to allow controlled expansion, reducing the likelihood of cracking and disc distortion
• Machined slot pattern promotes fresh pad material, strong initial response and consistent friction
• 72 curved, directional internal vanes push cool air through the ring for rapid heat extraction
• Up to 30 percent cooler running versus stock for reduced fade and better pedal stability
• Left and right specific rings optimise airflow across the front axle
• 6061 T6 aircraft grade bell lowers unsprung mass and manages thermal growth
• High temperature rotor alloy maintains integrity at sustained track temps
• Works with factory pad compound and popular performance pad options
• Supplied as a matched front axle pair

Real gains you can feel

On G80, G82, G83 and G87 platforms the standard drilled disc can saturate with heat during repeated heavy stops. The MMX two piece layout with slotted faces and directional venting keeps temperatures in check, shortens recovery between braking zones and helps the system resist fade. Expect cleaner pad surfaces, more consistent pedal travel and confidence lap after lap without compromising day to day refinement.

Tested by us, loved by customers

We have installed and driven these on customer cars and our own builds. Feedback is clear: stronger bite, reliable performance when hot and noticeably better durability under track day conditions. An ideal fast-road and circuit-ready front brake upgrade that retains OEM manners.

Technical details

• Size: 380 x 36 mm
• Construction: two piece floating rotor with aluminium bell
• Vane count: 72 curved, directional
• Friction face: slotted for consistent friction and pad deglazing
• Bell material: 6061 T6 aluminium
• Orientation: handed left and right

Vehicle compatibility

Front axle fitment for BMW G80 M3, G82 M4, G83 M4 Convertible and G87 M2 using the OE 380 mm front disc setup. Direct bolt-on with stock calipers and lines.

Pad choice and bedding

Compatible with OEM pads and widely used performance pad compounds. After installation, complete a proper bedding-in cycle to stabilise the rotor surface and pad transfer layer for optimum performance.

Professional fitting

We recommend professional installation. MJ Modifications in Warwickshire offers expert fitting and brake setup for G-series M cars. Request a quote at info@mjmodifications.co.uk.

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