2021-2026+ BMW M440i / M440d (G22/G23/G26) Carbon Ceramic Brake Kit
Official Warranty: 1‑year free replacement for quality defects or coating issues under normal (non-track) use.
2021-2026+ BMW M440i / M440d (G22/G23/G26) Carbon Ceramic Brake Kit — OEM-Size Replacement
The G22 coupe, G23 convertible, and G26 Gran Coupe M440i/M440d use heavy OEM iron discs that generate dust quickly and can show vibration after repeated high-speed braking. This StopFlex OEM-replacement kit keeps the factory brake layout and is built around the listed M440i/M440d rotor references: 348mm or 374mm front and 345mm rear, with carbon-ceramic rotors, matched pads, hats, and floating hardware. The payoff is lower rotating mass, cleaner open-wheel faces, and more stable friction when the B58/B57 4 Series is driven hard on mountain roads, autobahn-style use, or light track sessions.
- Fits the listed 2021-2026+ BMW M440i/M440d G22/G23/G26 configurations only when the car matches the page’s 348mm or 374mm front rotor reference and 345mm rear rotor reference.
- Designed for the M440i/M440d front fixed-caliper brake package and rear sliding-caliper layout, not for unrelated 430i, M4, or aftermarket big-brake conversions.
- Carbon-ceramic friction rings reduce brake dust and rotating weight versus the OEM iron discs while retaining OEM-size rotor diameters for factory caliper and wheel fitment checks.
Fitment Hard Lines
| Field | Specification |
|---|---|
| Vehicle | BMW M440i / M440d (G22/G23/G26) |
| Model years | 2021-2026+ |
| Front rotor reference | M440i/M440d: 348mm, 374mm |
| Rear rotor reference | M440i/M440d: 345mm |
| Page type | OEM-size carbon ceramic replacement |
| Minimum wheel size | 22" (for the 440 mm rotor) |
For OEM replacement orders, StopFlex builds around the factory rotor specification shown for this vehicle. Front floating-caliper setups require manual review before production. If the car uses aftermarket calipers such as Brembo, AP Racing, Alcon, or Wilwood, the order can still be built, but the exact caliper model, pad shape, and rotor dimensions must be confirmed before production.
This setup uses a 440 mm rotor, so the minimum wheel size is 22". Wheels under 22" will not clear the caliper and rotor, and spoke profile and offset affect clearance too — confirm your exact wheels before ordering.
Why StopFlex CCB
Lower Unsprung Mass
StopFlex carbon-ceramic rotors are engineered to reduce rotor mass versus comparable iron discs, helping the suspension react cleaner and the steering feel more precise.
High-Temperature Stability
The carbon-silicon-carbide matrix is built for stable braking behavior at temperatures that can push iron rotors into heavy fade.
Rust-Free Rotor Surface
Carbon ceramic does not form orange flash rust after rain, washing, or storage, keeping the visible rotor face cleaner behind open wheels.
Long Street-Service Potential
In normal road use with matched pads and proper bedding, StopFlex CCB rotors are designed for far longer service life than typical iron replacement rotors.
Low Visible Dust
When paired with matched StopFlex pads, the system produces very low visible brake dust compared with conventional iron rotor and pad combinations.
Premium Ceramic-Glaze Appearance
StopFlex's proprietary coating creates a bright, high-end ceramic-glaze finish with subtle glaze texture and a more premium visual character behind open wheels.
Street-Usable Cold Bite
Street Spec and Track-Day Spec rotors are designed for normal first-stop road use, including cold-weather operation. Motorsport Spec is the competition-focused exception.
Continuous Fiber Reinforcement
Long-fiber carbon ceramic construction improves structural strength and thermal durability versus chopped-fiber approaches.
Custom Rotor Hat Color
Every StopFlex OEM replacement order can be built with a custom rotor hat color, giving the carbon ceramic rotor package a cleaner match with the wheel, body color, and overall build style.
Heat Management Note
Carbon ceramic rotors tolerate extreme surface temperature, but they do not remove every heat-management requirement. During repeated hard stops, heat can still soak into pads, fluid, seals, calipers, wheels, and nearby components. For long track sessions, mountain descents, or sustained aggressive driving, brake cooling and high-temperature fluid are still recommended.
Street / Track-Day / Motorsport Rotor Options
Street Spec
Ceramic coating, cross-drilled face, and large cooling channels.
Best for daily driving and premium street builds that need clean cold bite, low dust, corrosion-free appearance, and long service life.
Track-Day Spec
Ceramic coating, blank face, and honeycomb cooling channels.
Best for fast-road and track-day use where repeated braking stability matters more than maximum visual drilling style.
Motorsport Spec
Uncoated blank face with honeycomb cooling channels.
Best for race-focused builds that run competition pads, high-temperature fluid, cooling strategy, and a proper warm-up window. Not the default street choice.
Package Scope
| Item | Details |
|---|---|
| CCB rotors | Full-car set by default |
| CCB brake pads | Matched for StopFlex carbon ceramic rotors |
| 7075 aluminum floating rotor hats | Vehicle-specific fitment |
| Stainless floating hardware | Full-car hardware set |
| Rotor hat color | Custom rotor hat colors are available for every OEM replacement order. |
| Order scope | Default listing is full-car set. Front-only or rear-only orders can be arranged after confirmation. |
FAQ
Will this kit fit every 2021-2026+ BMW M440i or M440d?
No. Fitment is limited to the G22 coupe, G23 convertible, and G26 Gran Coupe M440i/M440d trims that match the rotor sizes on this page: 348mm or 374mm front and 345mm rear. Confirm your VIN build sheet, option codes, or measured rotor diameter before ordering.
Does the rear electronic parking brake and Auto Hold still work?
Yes, the kit is an OEM-size replacement that keeps the factory rear caliper architecture, so the BMW electronic parking brake and Auto Hold functions remain tied to the original rear caliper system. Installation still requires normal BMW rear-brake service procedure for EPB-equipped cars.
Why switch from OEM iron rotors on an M440i or M440d?
The main reasons are less visible dust, lower rotating mass, and better resistance to heat-related fade during repeated braking. On the G22/G23/G26 M440i/M440d, the factory iron setup is effective for street use but can leave heavy dust on open wheels and develop vibration when overheated.
What should I confirm before ordering?
Confirm body code G22, G23, or G26; exact trim M440i or M440d; front rotor size of 348mm or 374mm; rear rotor size of 345mm; wheel clearance; and that the car still uses the factory calipers. This page is not intended for M4 brakes or non-OEM caliper conversions.
Need Fitment Confirmation?
Send the exact vehicle details, current rotor sizes, and caliper type before ordering.
More Contact Information
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