2014-2019 Mercedes-Benz GLA-Class / AMG (X156) CCB Big Brake Kit | OEM AMG 6-Piston
Official Warranty: 1‑year free replacement for quality defects or coating issues under normal (non-track) use.
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2014-2019 Mercedes-Benz GLA200 / GLA250 / GLA45 (X156) CCB Big Brake Kit — Genuine OEM AMG 6-Piston Caliper Front + TTSPORT EP4 4-Piston Caliper with EPB Rear Setup
The 2014-2019 Mercedes-Benz GLA X156 owner shopping this kit is usually trying to get past repeated iron-rotor heat stress, heavy brake dust on open wheels, or the cost of keeping a high-output compact SUV ready for hard street and track use. StopFlex builds this Kit Upgrade around a Genuine OEM AMG 6-Piston Caliper with a 390mm front carbon-ceramic rotor, then matches the rear with a TTSPORT EP4 4-Piston Caliper with EPB and 380mm carbon-ceramic rotor. The result is more front thermal capacity, lower rotating mass than comparable iron hardware, reduced dust, retained electronic parking-brake function, and fitment engineered for the confirmed GLA200, GLA250, or GLA45 rather than the platform name alone.
- 390mm front carbon-ceramic rotors require 20-inch or larger wheels on the GLA X156; wheels under 20 inches will not clear the front package, and spoke clearance must still be measured.
- The front axle uses the exact Genuine OEM AMG 6-Piston Caliper specified for this kit, paired with StopFlex hats, brackets, pads, hardware, and lines for the customer’s confirmed trim.
- The rear axle keeps the X156 electronic parking-brake function by using a TTSPORT EP4 4-Piston Caliper with EPB on 380mm carbon-ceramic rotors instead of deleting OE parking-brake convenience.
Fitment Hard Lines
| Field | Specification |
|---|---|
| Vehicle | Mercedes-Benz GLA200 / GLA250 / GLA45 (X156) |
| Model years | 2014-2019 |
| Front setup | Genuine OEM AMG 6-Piston Caliper / 390mm |
| Rear setup | TTSPORT EP4 4-Piston Caliper with EPB / 380mm |
| Page type | Complete CCB kit upgrade |
| Minimum wheel size | 20" (for the 390 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 390 mm front rotor, so the minimum wheel size is 20". Wheels under 20" 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 upgrade uses the Genuine OEM AMG 6-Piston Caliper, giving the GLA X156 a six-piston fixed-caliper layout for more even pad loading and a firmer, more repeatable pedal than a smaller sliding-caliper setup. Its OEM AMG provenance matters because the caliper is derived from production performance Mercedes hardware rather than an anonymous universal casting. StopFlex matches this caliper to a 390mm carbon-ceramic rotor with trim-specific brackets and hat offsets for the buyer’s exact GLA200, GLA250, or GLA45.
Rear Caliper (Balance)
The rear upgrade uses a TTSPORT EP4 4-Piston Caliper with EPB, adding real rear-axle service braking capacity while preserving the factory electronic parking-brake function. The EP4 uses four hydraulic service pistons plus a dedicated EPB actuator piston, so rear brake stability and parking-brake convenience are engineered into the same package.
Front & rear, engineered together: This kit is built as a front-and-rear system because the 390mm front rotor and Genuine OEM AMG 6-Piston Caliper need rear torque and heat capacity that do not leave the car front-biased under repeated braking. StopFlex matches the 380mm rear carbon-ceramic rotor, EP4 rear caliper, pads, lines, and hardware to the same confirmed trim so brake balance is engineered with the actual knuckle, hub, hat offset, and wheel package in mind.
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 OEM AMG 6-Piston Caliper |
| Front CCB rotors | 390mm |
| Rear calipers | TTSPORT EP4 4-Piston Caliper with EPB |
| 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. |
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. |
TTSPORT EP4S rear caliper specification (the EP4 shares the same engineering, slightly more compact):
| Specification | EP4S |
|---|---|
| Axle position | Rear |
| Piston count | 4 hydraulic + 1 EPB actuator |
| Piston type | Two-piece heat-insulated, dust boots + EPB actuator |
| Piston diameter | 28 mm × 4 / 27 mm × 1 |
| Total piston area | 30.4 cm² per caliper |
| Manufacturing process | Two-piece forged aluminum body |
| Net weight | 4.50 kg per caliper (no pads) |
| Surface finish | High-temperature gloss coating |
| Recommended wheel size | 18 in or larger |
FAQ
Will this kit fit my exact GLA200, GLA250, or GLA45 X156?
StopFlex does not treat every X156 as the same car. Before production, the kit is specified to your confirmed trim, year, hub and knuckle layout, wheel data, and brake configuration so the brackets, rotor-hat offsets, and caliper mounting match your exact GLA200, GLA250, or GLA45.
What wheel size do I need for the 390mm front rotor?
The 390mm front carbon-ceramic rotor requires 20-inch or larger wheels. Wheels under 20 inches will not clear this front package, and 20-inch wheels still need spoke-clearance verification against the Genuine OEM AMG 6-Piston Caliper.
Will the electronic parking brake still work?
Yes. This rear package uses the TTSPORT EP4 4-Piston Caliper with EPB, which combines four hydraulic service pistons with a dedicated EPB actuator piston so the GLA keeps electronic parking-brake operation while gaining a 380mm rear carbon-ceramic rotor.
Why choose carbon-ceramic instead of another iron big-brake kit?
Carbon-ceramic rotors reduce brake dust and rotating mass compared with comparable iron hardware, and they tolerate repeated high-temperature use without the same heat-soak behavior that drives fade and rotor stress. On this GLA X156 kit, the benefit is paired with a 390mm front rotor, Genuine OEM AMG 6-Piston Caliper, and matching EPB rear upgrade rather than a front-only conversion.
Need Fitment Confirmation?
Send the exact vehicle details, current rotor sizes, and caliper type before ordering.
More Contact Information
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