Do these BMW G8x brake rotors require different pads or calipers?

No. The BMW G8x brake rotors front set bolts directly onto the factory iron-brake hardware with no caliper, bracket, or pad changes required.

What is the benefit of the 2-piece floating design on these BMW G8x brake rotors?

The floating construction separates the rotor ring from the hat, allowing the ring to expand freely under heat rather than fighting against itself like a one-piece casting. This eliminates the internal stress that warps one-piece rotors, extends both pad and rotor life, and keeps pedal feel consistent under repeated heavy braking.

Why are these BMW G8x brake rotors slotted rather than cross-drilled?

On iron rotors, slots evacuate gas and pad material effectively without introducing the surface-cracking risk that aggressive cross-drilling can cause. Slotted iron rotors maintain structural integrity longer under sustained thermal cycling, which is why J-hook slots are the standard choice for track-focused iron brake upgrades.

Will these BMW G8x brake rotors fit a car with factory carbon ceramic brakes?

No. This rotor set is a direct replacement for the factory iron brake setup only. For a CCB-equipped G8x, see the MMX carbon ceramic front rotor (MMR30-1603F) linked in the Notes section.

Should I upgrade the rear BMW G8x brake rotors at the same time?

For balanced thermal behavior front to rear, MMX recommends pairing these front BMW G8x brake rotors with the matching 370x24mm rear set (MMR30-1602R). Upgrading both axles simultaneously ensures matched cooling efficiency and consistent brake bias throughout a session.

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Description

MMX 2-Piece Floating Front Brake Rotor Set 380x36mm for G8x BMW M2, M3, and M4

BMW G8x brake rotors front set from MMX Performance replaces the heavy one-piece factory front discs with a true 2-piece floating design that runs cooler, weighs less, and resists the warping and judder that hard track use inflicts on stock rotors — covering the G87 M2, G80 M3, and G82/G83 M4. The 380x36mm rotor rings float on separate hats, allowing the ring to expand radially and axially as it heats rather than fighting against itself like a one-piece casting, which dramatically extends pad and rotor life and keeps pedal feel consistent under repeated heavy braking. Larger directional internal cooling vanes improve cooling efficiency by up to 30% versus the OE disc, lowering peak temperatures and reducing fade across consecutive hard stops so the pedal feels the same at the end of a session as it did at the start. A J-hook-style slotted face evacuates gas and pad material under heavy use without the surface-cracking risk that aggressive cross-drilling introduces on iron rotors. Each pair is supplied as dedicated left- and right-handed directional units so vane geometry always matches rotation. Direct bolt-on to factory iron brake hardware; no caliper, bracket, or pad changes required.

Features

2-piece floating design (rotor ring + separate hat) eliminates internal stress and warping
Up to 30% improvement in cooling efficiency versus the OE disc
Larger directional internal cooling vanes for sustained thermal management
Lighter than OEM reduces unsprung and rotating mass for sharper steering response
J-hook style slotted face evacuates gas and pad material without cracking risk
Supplied as dedicated left- and right-handed directional units
Direct bolt-on; no caliper, bracket, or pad changes required
1-year manufacturer warranty against defects in materials and workmanship

Applications

BMW M2: G87 | 2023-present
BMW M3: G80 | 2021-present
BMW M4: G82, G83 | 2021-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 these BMW G8x brake rotors require different pads or calipers? No. The BMW G8x brake rotors front set bolts directly onto the factory iron-brake hardware with no caliper, bracket, or pad changes required.
What is the benefit of the 2-piece floating design on these BMW G8x brake rotors? The floating construction separates the rotor ring from the hat, allowing the ring to expand freely under heat rather than fighting against itself like a one-piece casting. This eliminates the internal stress that warps one-piece rotors, extends both pad and rotor life, and keeps pedal feel consistent under repeated heavy braking.
Why are these BMW G8x brake rotors slotted rather than cross-drilled? On iron rotors, slots evacuate gas and pad material effectively without introducing the surface-cracking risk that aggressive cross-drilling can cause. Slotted iron rotors maintain structural integrity longer under sustained thermal cycling, which is why J-hook slots are the standard choice for track-focused iron brake upgrades.
Will these BMW G8x brake rotors fit a car with factory carbon ceramic brakes? No. This rotor set is a direct replacement for the factory iron brake setup only. For a CCB-equipped G8x, see the MMX carbon ceramic front rotor (MMR30-1603F) linked in the Notes section.
Should I upgrade the rear BMW G8x brake rotors at the same time? For balanced thermal behavior front to rear, MMX recommends pairing these front BMW G8x brake rotors with the matching 370x24mm rear set (MMR30-1602R). Upgrading both axles simultaneously ensures matched cooling efficiency and consistent brake bias throughout a session.

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.

Additional Information

The Bulletproof Automotive website contains many thousands of products purchased in multiple different currencies. All of the prices are entered manually and accurately at the time of entry. Due to the consistently fluctuating international exchange rates, at times prices may not be able to be honored at their original intended rate. We apologize for any inconvenience this may cause, unfortunately our website is unable to compensate dynamically for what can at times be volatile changes in the cost of items due to currency values fluctuating, changes in prices from suppliers, changes in shipping and import duties, and other factors. Rest assured that any order you place on line will be at zero risk to you in this area. If in the event your order cannot be fulfilled at the original intended website price we will offer you a 100% refund, no questions asked. We will continue to do our best to maintain updated prices and we will always continue to offer our price match guarantees as well to ensure our prices are always the best for you. In short, prices may change without notice. It is always advised to give us a call prior to placing your order online to confirm availability and to confirm current pricing.

Shipping Policy

Items that are in stock in the US, either at Bulletproof’s warehouse or at a supplier’s warehouse, are generally delivered within 7-10 days. Special order items from overseas take considerably longer. As a courtesy Bulletproof offers delivery estimates to our customers which take into consideration manufacturer availability and shipping schedule. These estimates represent our best guess based on previous orders from the manufacturer and do not in any way imply a guaranteed delivery window. Many manufacturers work in a “just in time” inventory system and often take 2-20+ weeks to produce an item once an order is submitted. All deliverable items are then sent to our Japanese warehouse. Bulletproof ships a minimum of one full ocean freight container every month from Japan, oftentimes more than one a month. Ocean freight takes an average of 4 weeks. Typically it breaks down to one week in Japan for paperwork and customs, two weeks by boat and one week in US customs/clearance. Due to the wide number of variables between manufacturer and shipping schedules, delivery estimates are simply just that – estimates. We attempt to estimate conservatively and we usually deliver faster than our estimates suggest. It is not Bulletproof’s policy to guarantee delivery time of any special order item, this is impossible for us to do. By ordering you acknowledge that there is no required delivery ETA and an order may not be canceled or altered due to manufacturing or shipping delays, all ETA’s are provided as a best guess only. Please review the full Terms & Conditions here.

BP Pricing Difference

We do pricing a little differently on our JDM brands and we believe in making things simple and clear. No hidden fees or surcharges. Every price you see includes the shipping cost to our office in Los Angeles, California and all the associated taxes/duties/fees for bringing the products into the US. The only shipping you ever pay is from our facility in the US to your location. Be wary of resellers that don’t include the cost of international shipping in their pricing on JDM parts. While we believe we’ll always have the lowest all-in price on JDM products, we offer a price match guarantee for all authentic parts purchased from authorized dealers as well. For many international customers, it’s much more affordable to ship from the USA than from Japan directly, as the air freight and ocean freight costs are typically much less. However, for customers looking to ship directly from Japan outside of North America, or domestically in Japan, we can provide pricing specifically for that scenario. Please do not hesitate to contact us with any pricing questions or concerns. Please email us at sales@bulletproofautomotive.com with any inquiries.

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MMX 2-Piece Floating Front Rotor Set 380x36mm for G8X BMW M2 / M3 / M4 [MMR30-1601F]

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MMX 2-Piece Floating Front Brake Rotor Set 380x36mm for G8x BMW M2, M3, and M4

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Frequently Asked Questions

About MMX Performance

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