MMX 380x30mm Front 2-Piece Rotor | F8X

MMX 380x30mm Front 2-Piece Brake Rotors – BMW F87 M2, F80 M3 & F82/F83 M4

Upgrade the front braking performance of your BMW F8X M car with the MMX 380x30mm Front 2-Piece Brake Rotors.

Designed as a direct replacement for the factory front brake discs, the MMX rotors retain compatibility with the OEM calipers while introducing a lighter, floating two-piece construction and significantly improved cooling.

Supplied as a left- and right-handed pair, each 380mm x 30mm rotor uses a dedicated directional design with 72 curved cooling vanes to move air through the disc more efficiently. MMX states this design can improve cooling efficiency by up to 30% compared with the original equipment discs.

For fast-road, track-day and performance-focused F87 M2, F80 M3 and F82/F83 M4 builds, the MMX two-piece rotor kit provides a substantial braking upgrade without requiring replacement calipers.

Why Upgrade the F8X Front Brake Rotors?

The factory F-Series M brake system is already equipped with substantial front calipers, but the original drilled discs can become a limiting factor during sustained hard use.

Repeated heavy braking generates considerable heat within the rotor.

On fast-road and track-driven cars, excessive disc temperature can contribute to:

• Brake fade
• Inconsistent pedal feel
• Increased pad wear
• Disc cracking
• Thermal distortion
• Reduced braking consistency

The MMX two-piece rotor system is designed to address these issues through improved cooling, reduced weight and a floating disc construction.

Key Features

• MMX 380x30mm front brake rotor kit
• Designed for BMW F8X M cars
• 380mm diameter
• 30mm thickness
• Two-piece floating construction
• Supplied as a matched left- and right-handed pair
• 72 directional curved cooling vanes
• Up to 30% improved cooling efficiency compared with OE
• Designed to run up to 30% cooler than factory discs
• Aerospace-grade aluminium rotor hats
• Floating bobbin mounting system
• Reduced weight compared with OEM discs
• Direct replacement for factory front brake discs
• Compatible with OEM front calipers
• Compatible with OEM brake pads
• Compatible with aftermarket performance pads
• Suitable for road and track use
• Matching MMX 370x24mm rear rotors available
• MMX part number MMR30-1001F

380mm x 30mm Rotor Size

The MMX front rotors retain a 380mm x 30mm disc specification.

This allows the upgrade to work with the original F8X front brake calipers while improving the construction and cooling characteristics of the disc itself.

Because the factory caliper arrangement is retained, owners can improve braking performance without moving to a complete aftermarket big brake kit.

Two-Piece Floating Construction

Each MMX rotor separates the friction ring from the central aluminium hat.

The two components are joined using a floating bobbin mounting system.

This construction allows the friction ring to expand more freely as temperature increases.

Under heavy braking, the rotor grows both radially and axially as it absorbs heat.

A floating system allows this thermal expansion to occur with less stress being transferred into the disc and mounting assembly.

This helps reduce the risk of:

• Disc distortion
• Thermal stress
• Cracking
• Uneven pad contact

Improved Cooling

Heat management is one of the primary advantages of the MMX rotor design.

MMX states its F8X front rotors can run up to 30% cooler than the original equipment discs.

Lower disc temperatures can help maintain more consistent braking performance during repeated stops and longer track sessions.

Improved cooling can also benefit:

• Brake pad life
• Rotor durability
• Pedal consistency
• Brake fluid temperature management
• Overall braking confidence

72 Directional Cooling Vanes

Each rotor uses 72 correctly oriented curved cooling vanes.

Rather than using a generic internal vane pattern, the discs are specifically left- and right-handed.

As the rotor turns, the directional vane structure helps pump air through the centre of the disc.

This increases heat transfer away from the friction surfaces and helps the rotor cool more effectively.

Left & Right-Handed Rotors

The kit includes separate left- and right-hand discs.

This is important because the curved cooling vanes need to rotate in the correct direction to work effectively.

Correct directional installation ensures the internal vane system actively draws cooler air through the rotor rather than simply relying on passive airflow.

Reduced Unsprung & Rotational Weight

MMX states each two-piece disc weighs less than the equivalent OEM component.

Reducing brake rotor weight can contribute to a reduction in both:

• Unsprung mass
• Rotational mass

Lower unsprung mass can help the suspension respond more effectively to changes in road surface.

Reducing rotational mass can also reduce the energy required to accelerate and decelerate the wheel assembly.

The primary benefit remains braking performance, but weight reduction is an additional advantage of the two-piece design.

Aerospace-Grade Aluminium Hats

The rotor hats are manufactured from aerospace-grade aluminium.

Using aluminium for the central hat reduces weight compared with an all-steel construction while retaining the strength required to locate the braking surface accurately.

The hat is separated from the friction ring by the floating bobbin system, allowing each component to perform its own function more effectively.

Floating Bobbin System

The disc and aluminium hat are connected through floating bobbins.

These allow controlled movement between the two components as the rotor heats and cools.

This reduces stress across the assembly and allows the iron friction ring to expand without being rigidly constrained by the central hat.

For cars exposed to repeated high temperatures, this is an important advantage over simpler fixed or one-piece designs.

Direct Fit with OEM Calipers

The MMX rotors are designed specifically around the original F8X front braking system.

They fit with the factory calipers, meaning no replacement caliper, bracket or hydraulic modification is required.

This makes them an excellent upgrade for owners who are happy with the capability of the OEM caliper but want better heat management and rotor performance.

OEM & Aftermarket Brake Pad Compatibility

The MMX discs can be used with:

• Factory BMW brake pads
• MMX performance pads
• Compatible aftermarket fast-road pads
• Compatible track-focused pads

This gives owners flexibility to tailor the braking system to the vehicle’s intended use.

MMX RP650 Fast-Road Pad Combination

For a road and fast-road setup, the MMX RP650 front pads can be combined with the two-piece rotors.

This provides an upgraded friction material alongside the improved thermal capability of the rotor.

Such a setup is well suited to cars used for:

• Fast-road driving
• Occasional track days
• Performance road use

Track-Focused Pad Options

For more demanding circuit use, a more aggressive performance or track pad can be paired with the MMX rotors.

The improved cooling characteristics of the discs become increasingly valuable as pad friction level and braking temperature rise.

When selecting track pads, brake fluid and overall brake system temperature capability should also be considered.

Better Brake Consistency

A performance brake upgrade is not only about creating more peak braking force.

Consistency is equally important.

A cooler-running rotor can provide more stable conditions for the pad throughout repeated braking events.

This can help maintain:

• More predictable pedal response
• More consistent pad friction
• Reduced fade
• Greater confidence during longer sessions

Fast-Road Benefits

On a fast-road car, the MMX rotors offer several advantages without making the brake system unnecessarily complex.

They retain:

• Factory calipers
• Factory brake hydraulics
• OEM-style fitment
• Broad pad compatibility

while improving:

• Cooling
• Rotor construction
• Weight
• Thermal durability

This makes them particularly appealing for modified road cars that may only see occasional circuit use.

Track-Day Benefits

Track driving places considerably more stress on the front brakes than normal road use.

Repeated stops from high speed generate significant rotor temperatures.

The MMX two-piece design helps manage these temperatures through:

• Directional internal vanes
• Floating construction
• Large 380mm friction rings
• Improved airflow
• Reduced thermal stress

For regular track use, they provide a meaningful upgrade over standard replacement discs.

Direct Replacement Upgrade

One of the key strengths of the MMX system is that it does not require the compromises or installation complexity of a full big brake kit.

For compatible cars, the factory:

• Calipers
• Brake lines
• Mounting points
• Pad dimensions

can remain unchanged.

This allows owners to concentrate their upgrade budget on improving the rotor and pad combination.

Matching Rear Two-Piece Rotors

MMX also offers matching 370x24mm rear two-piece rotors for F8X M cars.

Using matching front and rear rotors provides:

• Consistent two-piece construction
• Improved thermal management across both axles
• Matching appearance
• More complete braking system upgrade

Ideal Supporting Upgrades

For maximum benefit, consider combining the front rotors with:

• Performance brake pads
• High-temperature brake fluid
• Braided brake lines
• Matching rear two-piece rotors
• Brake cooling upgrades
• Performance tyres

The braking system should always be treated as a complete package, particularly on track-driven cars.

BMW F87 M2

The MMX 380x30mm front rotor is listed for the BMW F87 M2 platform, including the original M2 and later M2 Competition applications.

For fast-road and track-focused F87 builds, it provides a substantial thermal upgrade while retaining the factory front calipers.

BMW F80 M3

The rotor kit is suitable for BMW F80 M3 applications using the compatible factory 380mm steel brake setup.

This makes it particularly useful for M3 owners looking to improve repeated braking performance without installing a complete aftermarket brake kit.

BMW F82 / F83 M4

The MMX front rotors are also listed for the BMW F82 M4 Coupe and F83 M4 Convertible.

The same two-piece floating construction and directional cooling system provide improved thermal performance for road and circuit driving.

Compatibility

Designed for applicable BMW F8X M cars including:

• BMW F87 M2
• BMW F87 M2 Competition
• BMW F80 M3
• BMW F82 M4
• BMW F83 M4 Convertible

The rotors are designed around the compatible OEM 380mm front brake arrangement.

Please confirm the existing brake specification on your vehicle before ordering, particularly on cars equipped with alternative factory brake packages.

What's Included?

The MMX 380x30mm Front 2-Piece Rotor Kit includes:

• 1x left-hand 380x30mm two-piece floating front rotor
• 1x right-hand 380x30mm two-piece floating front rotor
• Aerospace-grade aluminium hats
• Floating bobbin assemblies

Supplied as a complete front axle pair.

Explore More BMW F8X Brake Upgrades

Looking to improve your F8X braking system further? Explore our range of performance brake components.

BMW F87 M2 Parts – Shop brakes, suspension and performance upgrades for the BMW F87 M2.

BMW F87 M2 Competition Parts

BMW F80 M3 Parts – Explore braking and chassis upgrades for the BMW F80 M3.

BMW F82 / F83 M4 Parts – Browse performance brake products for the BMW F8X M4.

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