2016-2020 Cadillac CT6 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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2016-2020 Cadillac CT6 / CT6-V CCB Big Brake Kit — Genuine Brembo GT6 Front + Genuine Brembo GT4 Rear Setup
This 2016-2020 Cadillac CT6 / CT6-V kit is for owners who want the heat capacity and low-dust behavior of carbon ceramic rotors without guessing at CT6 platform fitment. The primary front upgrade uses the Genuine Brembo GT | M6 6-piston caliper with a 380mm carbon-ceramic rotor, paired with 380mm rear carbon-ceramic hardware and Brembo 4-piston rear caliper options. Each kit is built around the customer's confirmed CT6 or CT6-V trim so the rotor hats, brackets, caliper position, and brake lines match the actual car instead of a shared chassis label.
- Front GT6 configuration uses a Genuine Brembo GT | M6 6-piston caliper with a 380mm carbon-ceramic rotor; V6 uses a Genuine Brembo OEM Cadillac CTS-V 6-piston caliper with a 370mm rotor, and GTS6 uses a Genuine Brembo GT | S6 6-piston caliper with a 380mm rotor.
- Rear configuration uses 380mm carbon-ceramic rotors with Brembo V4, GT4, or GTS4 4-piston caliper options to keep rear braking contribution matched to the front upgrade.
- The 380mm rotor package requires 19-inch or larger wheels, and spoke clearance must be confirmed because CT6, CT6 Sport, Platinum, and CT6-V wheel offsets and face profiles are not interchangeable fitment assumptions.
Fitment Hard Lines
| Field | Specification |
|---|---|
| Vehicle | Cadillac CT6 / CT6-V |
| Model years | 2016-2020 |
| Front setup | Brembo V6 / GT6 / GTS6 6-Piston Caliper Options / 380mm |
| Rear setup | Brembo V4 / GT4 / GTS4 4-Piston Caliper Options / 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)
Brembo V6 / GT6 / GTS6 6-Piston Caliper Options give the CT6 front axle a fixed 6-piston layout for even pad loading, stronger clamp control, and a firmer pedal than a smaller sliding-caliper arrangement. The buyer chooses from V6 = Genuine Brembo OEM Cadillac CTS-V 6-Piston Caliper with a 370mm rotor, GT6 = Genuine Brembo GT | M6 6-Piston Caliper with a 380mm rotor, or GTS6 = Genuine Brembo GT | S6 6-Piston Caliper with a 380mm rotor. These are genuine Brembo caliper paths, not cosmetic covers or generic castings.
Rear Caliper (Balance)
Brembo V4 / GT4 / GTS4 4-Piston Caliper Options pair a fixed 4-piston rear caliper with a 380mm carbon-ceramic rotor so the rear axle continues contributing to stability instead of being left behind a front-only upgrade. Rear engineering is specified around the CT6 factory electronic parking brake requirements during trim confirmation.
Front & rear, engineered together: The front and rear packages are engineered together so piston area, rotor diameter, pad selection, hat offset, and line routing work as one braking system. That matters on the CT6 / CT6-V because a large front-only conversion can change pedal feel and brake balance if the rear torque contribution and parking-brake packaging are not addressed at the same time.
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 | 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 — 370 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 — 380 mm rotor GT4 = Genuine Brembo GT | M4 4-Piston Caliper — 380 mm rotor GTS4 = Genuine Brembo GT | S4 4-Piston Caliper — 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 2016-2020 CT6 or CT6-V trim?
Fitment is confirmed per vehicle before production. StopFlex does not treat the CT6, CT6 Sport, Platinum, and CT6-V as one universal bolt-on platform; brackets, rotor-hat offsets, caliper mounting, brake lines, and wheel clearance are matched to the customer's exact trim and factory brake configuration.
What wheel size do I need for the 380mm Brembo GT6 setup?
The 380mm front and rear rotor options require 19-inch or larger wheels. Wheel diameter alone is not enough; StopFlex also checks spoke clearance because the Genuine Brembo GT | M6 6-piston front caliper needs adequate face clearance behind the wheel.
Will the electronic parking brake still work?
The CT6 family uses a factory Electric Parking Brake, so rear fitment must account for EPB operation. StopFlex verifies the customer's exact rear brake and EPB configuration before finalizing the V4, GT4, or GTS4 rear package.
Why choose carbon ceramic rotors on a CT6 / CT6-V instead of iron rotors?
Carbon ceramic rotors reduce brake dust, resist heat saturation under repeated high-speed stops, and cut rotating unsprung mass compared with equivalent iron hardware. On a large Cadillac sedan running open wheels or performance tires, those gains are most noticeable as cleaner wheels, more consistent pedal behavior, and less front-end mass during steering and braking transitions.
Need Fitment Confirmation?
Send the exact vehicle details, current rotor sizes, and caliper type before ordering.
More Contact Information
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