2022-2026+ BMW I4 (G26) CCB Big Brake Kit | Brembo GT6 6-Piston
Official Warranty: 1‑year free replacement for quality defects or coating issues under normal (non-track) use.
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2022-2026+ BMW I4 (G26) CCB Big Brake Kit — Genuine Brembo GT6 Front + Genuine Brembo GT4 Rear Setup
The 2022-2026+ BMW i4 G26 is heavy, quick, and quiet enough that brake dust, low-speed noise, and heat-soaked iron rotors become visible and audible fast. This StopFlex kit replaces the factory brake package with 380mm front carbon-ceramic rotors and Brembo V6 / GT6 / GTS6 6-Piston Caliper Options, with matched 4-piston Brembo rear options on 355 or 380mm rotors. Each kit is engineered to the customer’s exact i4 trim and wheel package so rotor-hat offset, caliper bracket geometry, and spoke clearance are confirmed before production.
- Front carbon-ceramic rotor size is 380mm on every V6, GT6, and GTS6 front option, so 19-inch wheels are the minimum and spoke clearance still must be checked.
- Rear Brembo V4, GT4, and GTS4 4-piston options can be built around 355mm or 380mm carbon-ceramic rotors to match the front system and target brake balance.
- BMW i4 G26 fitment is validated by exact trim, not just chassis code, because eDrive and M/performance variants can require different bracket and rotor-hat offset solutions.
Fitment Hard Lines
| Field | Specification |
|---|---|
| Vehicle | BMW I4 (G26) |
| Model years | 2022-2026+ |
| Front setup | Brembo V6 / GT6 / GTS6 6-Piston Caliper Options / 380mm |
| Rear setup | Brembo V4 / GT4 / GTS4 4-Piston Caliper Options / 355/380mm |
| Page type | Complete CCB kit upgrade |
| Minimum wheel size | 19" (for the 380 mm front rotor) |
Every StopFlex kit is bespoke-engineered for your exact model and trim — the brackets, rotor-hat offsets, and caliper mounting are matched to your specific car, not assumed from the platform. This matters because trims that share a chassis name can differ mechanically: a pure M or performance variant often carries different front knuckles/uprights, hub geometry, and wheel axial (ET) clearance than the standard models in the same family, so a bracket and hat offset that bolt onto one are not the same parts that fit the other. StopFlex supplies the calipers, pads, rotor hats, floating hardware, and brake lines as a matched system built to your confirmed trim. Cars with modified knuckles, modified uprights, or non-factory suspension mounting points must be reviewed before ordering and are not treated as direct-fit.
This setup uses a 380 mm front rotor, so the minimum wheel size is 19". Wheels under 19" will not clear the caliper and rotor, and spoke profile and offset affect clearance too — confirm your exact wheels before ordering.
| Wheel Size (Standard) | Disc Range |
|---|---|
| 15" | 260 mm – 285 mm |
| 16" | 285 mm – 300 mm |
| 17" | 300 mm – 330 mm |
| 18" | 330 mm – 355 mm |
| 19" | 355 mm – 380 mm |
| 20" | 380 mm – 400 mm |
| 21" | 400 mm – 420 mm |
| 22" | 420 mm – 440 mm |
Caliper Overview — Front & Rear Balance
Front Caliper (Primary Upgrade)
The front axle uses Brembo V6 / GT6 / GTS6 6-Piston Caliper Options, giving the i4 a larger, stiffer multi-piston clamp package for more even pad loading and a firmer pedal response than a smaller factory sliding or fixed-caliper setup. The buyer chooses among V6 = Genuine Brembo OEM Cadillac CTS-V 6-Piston Caliper — 380 mm rotor; GT6 = Genuine Brembo GT | M6 6-Piston Caliper — 380 mm rotor; or GTS6 = Genuine Brembo GT | S6 6-Piston Caliper — 380 mm rotor. All front options are genuine Brembo calipers paired with StopFlex carbon-ceramic rotors, hats, pads, brackets, hardware, and lines.
Rear Caliper (Balance)
The rear axle uses Brembo V4 / GT4 / GTS4 4-Piston Caliper Options on 355 or 380mm carbon-ceramic rotors to keep rear torque contribution and chassis stability matched to the 380mm front system. Because the BMW i4 G26 uses an electronic parking brake, the rear configuration is engineered to retain the required parking-brake function when the rear kit is specified.
Front & rear, engineered together: The front and rear packages are engineered as one brake system so piston area, rotor diameter, pad selection, and hydraulic behavior are matched to the i4’s weight distribution and regenerative-braking handoff. A front-only mismatch can change brake bias and ABS behavior; this kit is built around confirmed front and rear hardware for the exact trim.
Make It Yours — Color & Logo Customization
Every StopFlex kit-upgrade order can be finished with custom caliper colors, a custom caliper logo, and custom rotor hat colors, so the brake package matches your exact build instead of a fixed off-the-shelf look.
- Custom caliper color
- Custom caliper logo
- Custom rotor hat color
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.
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 |
|---|---|
| Front calipers | Brembo V6 / GT6 / GTS6 6-Piston Caliper Options |
| Front CCB rotors | 380mm |
| Rear calipers | Brembo V4 / GT4 / GTS4 4-Piston Caliper Options |
| Rear CCB rotors | 355/380mm |
| CCB brake pads | Matched for the supplied StopFlex carbon ceramic rotors |
| Rotor hats and floating hardware | Vehicle-specific hardware package |
| Brake lines | Included for complete kit-upgrade orders |
| Color customization | Custom caliper colors, a custom caliper logo, and custom rotor hat colors are available for every kit-upgrade order. |
| Order scope | Default listing is full-car set when front and rear are specified. Front-only or rear-only orders can be arranged after confirmation. |
| Front caliper option mapping | V6 = Genuine Brembo OEM Cadillac CTS-V 6-Piston Caliper — 380 mm rotor GT6 = Genuine Brembo GT | M6 6-Piston Caliper — 380 mm rotor GTS6 = Genuine Brembo GT | S6 6-Piston Caliper — 380 mm rotor |
| Rear caliper option mapping | V4 = Genuine Brembo OEM Cadillac CTS-V 4-Piston Caliper — 355 / 380 mm rotor GT4 = Genuine Brembo GT | M4 4-Piston Caliper — 355 / 380 mm rotor GTS4 = Genuine Brembo GT | S4 4-Piston Caliper — 355 / 380 mm rotor |
EPB & Rear Caliper Options
This vehicle leaves the factory with an electronic parking brake (EPB) built into the rear brake, so the rear of the kit is built to keep that EPB working. There are two rear paths. The first is a dual-caliper rear: a main performance caliper handles braking while a dedicated EPB actuator caliper is retained alongside it, so the electronic parking brake, auto-hold, and hill-start assist all keep working; on this path the rear performance caliper can be the TTSPORT EP4 / EP4S 4-piston caliper. The second is an EPB-integrated caliper, a single rear caliper with the electromechanical parking-brake motor built in for a cleaner install with fewer parts behind the wheel; on this path the rear is the TTSPORT EP4 / EP4S 4-piston caliper with integrated EPB. Which path fits best depends on your exact trim and EPB configuration, your budget, your appearance preference, and your wheel size and spoke clearance. Confirm your car's rear-brake configuration with StopFlex before ordering so the correct EPB-compatible rear option is built for your kit.
| Rear option | What it is | Rear caliper | Best when |
|---|---|---|---|
| Dual caliper (EPB retained) | Performance caliper plus a dedicated EPB actuator caliper, both fitted on the rear, so the factory electronic parking brake keeps working. | TTSPORT EP4 / EP4S 4-Piston Caliper | You want guaranteed factory EPB, auto-hold, and hill-start behavior preserved. |
| EPB-integrated caliper | A single rear caliper with the electromechanical parking-brake motor built in, for a cleaner install with fewer parts behind the wheel. | TTSPORT EP4 / EP4S 4-Piston Caliper with integrated EPB | You want a cleaner single-caliper rear with full EPB function. |
FAQ
Will this kit fit my exact 2022-2026+ BMW i4 G26 trim?
Fitment is confirmed by exact model, trim, brake package, wheel size, and wheel offset before production. StopFlex does not assume that every G26 i4 uses the same bracket geometry or rotor-hat offset, especially across eDrive and M/performance variants.
What wheel size do I need for the 380mm front setup?
The 380mm front carbon-ceramic rotor requires at least a 19-inch wheel. Wheel diameter alone is not enough; StopFlex also checks spoke clearance against the Brembo V6 / GT6 / GTS6 6-piston caliper profile.
Will the electronic parking brake and Auto Hold still work?
Yes, the BMW i4 G26 uses an electronic parking brake, and the rear kit is configured around EPB retention when the rear Brembo V4 / GT4 / GTS4 4-piston option is ordered. EPB details are verified during the trim-specific build review.
Why switch an i4 from iron brakes to carbon ceramic?
Carbon-ceramic rotors reduce brake dust on open BMW wheels, cut rotating and unsprung mass, and tolerate repeated heat cycles better than iron rotors in hard road or track use. On a quiet EV like the i4, the reduction in visible dust and brake noise sensitivity is a practical ownership benefit, not just a performance upgrade.
Need Fitment Confirmation?
Send the exact vehicle details, current rotor sizes, and caliper type before ordering.
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