2013-2016 Mercedes-Benz GL-Class / AMG (X166) CCB Big Brake Kit | Akebono 10N 10-Piston
Official Warranty: 1‑year free replacement for quality defects or coating issues under normal (non-track) use.
We Ship Worldwide
2013-2016 Mercedes-Benz GL350 / GL450 / GL550 / GL63 (X166) CCB Big Brake Kit — Genuine Akebono OEM Porsche 10-Piston (10N) Caliper Front + Genuine Brembo OEM Porsche 19Z 4-Piston Caliper Rear Setup
The 2013-2016 GL350, GL450, GL550 and GL63 X166 are heavy three-row SUVs, so repeated highway stops, mountain descents and towing use can load the factory iron brakes with heat and dust. This StopFlex kit replaces the original brake package with 420mm front carbon-ceramic rotors clamped by a Genuine Akebono OEM Porsche 10-Piston (10N) Caliper and 410mm rear carbon-ceramic rotors with a Genuine Brembo OEM Porsche 19Z 4-Piston Caliper. Each kit is engineered to the buyer’s confirmed GL trim, wheel package and hub geometry so the brackets, hats and line routing match the exact vehicle rather than the X166 platform name alone.
- 420mm front rotors require 21-inch or larger wheels on the X166 GL; wheels under 21 inches will not clear the rotor, and spoke clearance must also be checked.
- The front axle uses a Genuine Akebono OEM Porsche 10-Piston (10N) Caliper with 420mm carbon-ceramic rotors to increase thermal capacity for a heavy GL350, GL450, GL550 or GL63.
- The rear axle is matched with a Genuine Brembo OEM Porsche 19Z 4-Piston Caliper and 410mm carbon-ceramic rotors so rear torque contribution is engineered with the front upgrade, not added as an afterthought.
Fitment Hard Lines
| Field | Specification |
|---|---|
| Vehicle | Mercedes-Benz GL350 / GL450 / GL550 / GL63 (X166) |
| Model years | 2013-2016 |
| Front setup | Genuine Akebono OEM Porsche 10-Piston (10N) Caliper / 420mm |
| Rear setup | Genuine Brembo OEM Porsche 19Z 4-Piston Caliper / 410mm |
| Page type | Complete CCB kit upgrade |
| Minimum wheel size | 21" (for the 420 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 420 mm front rotor, so the minimum wheel size is 21". Wheels under 21" 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 caliper is the Genuine Akebono OEM Porsche 10-Piston (10N) Caliper, selected for its ten-piston layout and broad pad support across the 420mm rotor face. The OEM-derived Akebono architecture gives the front axle the clamping distribution and pedal control needed on a full-size X166 GL while retaining a production-proven performance caliper body rather than an unbranded casting. StopFlex engineers the caliper mounting and rotor-hat offset for the confirmed GL350, GL450, GL550 or GL63 trim.
Rear Caliper (Balance)
The rear caliper is the Genuine Brembo OEM Porsche 19Z 4-Piston Caliper paired with a 410mm carbon-ceramic rotor. Its role is to support rear brake torque and vehicle stability so the long, heavy X166 chassis stays settled under hard braking instead of relying on an oversized front-only conversion.
Front & rear, engineered together: The 420mm front and 410mm rear carbon-ceramic package is specified as a complete system so piston area, rotor diameter, pad choice and axle balance are evaluated together. That matters on the GL-Class because a front-only brake increase can change pedal response and ABS intervention behavior without adding matched rear capacity.
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 | Genuine Akebono OEM Porsche 10-Piston (10N) Caliper |
| Front CCB rotors | 420mm |
| Rear calipers | Genuine Brembo OEM Porsche 19Z 4-Piston Caliper |
| Rear CCB rotors | 410mm |
| 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. |
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 GL350, GL450, GL550 or GL63?
Fitment is confirmed per vehicle before production. StopFlex does not assume that every X166 GL shares the same brake geometry; brackets, rotor-hat offsets, caliper mounting and line routing are matched to the buyer’s exact trim and factory brake configuration.
What wheel size is required for the 420mm front rotor?
The 420mm front rotor requires 21-inch or larger wheels. Wheels under 21 inches will not clear the rotor, and 21-inch wheels still need spoke-clearance verification against the Genuine Akebono OEM Porsche 10-Piston (10N) Caliper.
Will the electronic parking brake still work?
The X166 GL uses a factory electronic parking brake, so rear-kit engineering must account for EPB function. StopFlex confirms the exact rear hardware and parking-brake requirements during fitment review before the kit is built.
Why switch this GL-Class to carbon-ceramic brakes instead of another iron setup?
Carbon-ceramic rotors reduce brake dust, resist heat saturation and reduce rotating unsprung mass compared with large iron rotors. On a heavy GL350, GL450, GL550 or GL63, the main benefits are cleaner wheels, more consistent braking during repeated stops and a large 420mm/410mm brake package without the same iron-rotor weight penalty.
Need Fitment Confirmation?
Send the exact vehicle details, current rotor sizes, and caliper type before ordering.
More Contact Information
We’re here to help! Whether you need expert advice on brake setups, have questions about your order, or just want to share feedback, our team is ready to assist you. Reach out via your preferred channel below, or use the inquiry form.
Get in Touch
Business Hours
Monday – Saturday, 9:30 AM – 6:30 PM (GMT +8)
Current Time:
Follow Us
- Choosing a selection results in a full page refresh.