2013-2019 Mercedes-AMG GLS63 / GL63 (X166) Carbon Ceramic Brake Kit
Official Warranty: 1‑year free replacement for quality defects or coating issues under normal (non-track) use.
2013-2019 Mercedes-AMG GLS63 / GL63 (X166) Carbon Ceramic Brake Kit — OEM-Size Replacement
The X166 GL63 and GLS63 are heavy, high-power AMG SUVs, so repeated high-speed stops put real thermal load into the factory 390mm front and 345mm rear brake package. This StopFlex OEM-size carbon-ceramic replacement kit keeps the factory rotor diameters and caliper locations while replacing the iron wear components with carbon-ceramic rotors, matched pads, hats, and floating hardware for lower brake dust, reduced rotating mass, and better heat stability under mountain, highway, and track-day use.
- Built around the AMG X166 rotor references: 390mm front and 345mm rear for 2013-2019 GL63 / GLS63 applications listed on this page.
- OEM-size design retains the factory caliper positions, wheel fit envelope, and brake balance instead of converting the SUV to an oversized big-brake layout.
- Carbon-ceramic rotors reduce the iron-rotor dust that collects on the large AMG wheels and resist heat-related judder during repeated stops in a 5.5L biturbo V8 X166.
Fitment Hard Lines
| Field | Specification |
|---|---|
| Vehicle | Mercedes-AMG GLS63 / GL63 (X166) |
| Model years | 2013-2019 |
| Front rotor reference | GLS63/GL63: 390mm |
| Rear rotor reference | GLS63/GL63: 345mm |
| Page type | OEM-size carbon ceramic replacement |
| Minimum wheel size | 20" (for the 390 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 390 mm 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.
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 X166 GL-Class or GLS-Class?
No. This page is limited to 2013-2019 Mercedes-AMG GL63 / GLS63 X166 vehicles using the listed 390mm front and 345mm rear AMG brake setup. It is not a fitment claim for GL350, GL450, GL550, GLS450, or GLS550 trims unless they have been specifically verified against this brake package.
Do I need different calipers or wheels?
This is an OEM-size replacement kit, so it is designed around the factory AMG caliper locations and the 390mm front / 345mm rear rotor diameters. Before ordering, confirm your current rotor diameters, caliper setup, and wheel clearance, especially if the SUV has aftermarket wheels or spacers.
Will the electronic parking brake and Auto Hold still work?
Yes, the kit is intended to retain the factory rear brake functions when installed on the correct X166 AMG brake configuration. The rear carbon-ceramic rotor and pad package is matched to the listed 345mm rear setup, so the vehicle’s original EPB-controlled rear brake architecture is not deleted.
Why switch from the factory iron rotors on a GL63 or GLS63?
The factory-size iron rotors carry substantial mass and generate visible dust on AMG wheels. Carbon-ceramic replacements cut rotating and unsprung mass at each corner, tolerate repeated heat cycles better, and keep the OEM brake geometry instead of changing pedal feel through a non-factory rotor size.
Need Fitment Confirmation?
Send the exact vehicle details, current rotor sizes, and caliper type before ordering.
More Contact Information
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