2006-2013 Mercedes-Benz R-Class / AMG (W251) 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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2006-2013 Mercedes-Benz R350 / R500 / R63 (W251) CCB Big Brake Kit — Genuine Brembo GT6 Front + Genuine Brembo GT4 Rear Setup
The W251 R-Class is a heavy Mercedes platform, and repeated braking can turn factory iron rotors into a heat, dust, and pedal-consistency problem, especially on R500 and R63 builds running larger wheels. This StopFlex kit replaces the factory brake package with 380 mm carbon-ceramic rotors, Brembo V6 / GT6 / GTS6 6-piston front caliper options, and Brembo V4 / GT4 / GTS4 4-piston rear caliper options. Each kit is built against the buyer’s exact R350, R500, or R63 trim so the brackets, hat offsets, brake lines, and caliper mounting are matched to the car, not assumed from the W251 chassis name.
- 380 mm front and rear carbon-ceramic rotors require 19-inch or larger wheels on the W251 R-Class; spoke clearance is checked before the kit is built.
- Front choices are V6, GT6, or GTS6 Genuine Brembo 6-piston calipers on 380 mm rotors, giving the R350, R500, or R63 a larger thermal package than a stock iron setup.
- The R63 AMG is not treated as mechanically interchangeable with standard R350/R500 trims; StopFlex confirms trim-specific mounting and rotor-hat offset before production.
Fitment Hard Lines
| Field | Specification |
|---|---|
| Vehicle | Mercedes-Benz R350 / R500 / R63 (W251) |
| Model years | 2006-2013 |
| 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)
The front package uses Brembo V6 / GT6 / GTS6 6-Piston Caliper Options, with the buyer choosing V6 = Genuine Brembo OEM Cadillac CTS-V 6-Piston Caliper, GT6 = Genuine Brembo GT | M6 6-Piston Caliper, or GTS6 = Genuine Brembo GT | S6 6-Piston Caliper, each paired with a 380 mm rotor. The 6-piston layout spreads clamping load across the pad for stable pedal response and controlled pressure distribution on a heavy W251 chassis. These are genuine Brembo calipers, selected for proven OEM and performance aftermarket use rather than an unbranded casting.
Rear Caliper (Balance)
The rear package uses Brembo V4 / GT4 / GTS4 4-Piston Caliper Options on 380 mm rotors: V4 = Genuine Brembo OEM Cadillac CTS-V 4-Piston Caliper, GT4 = Genuine Brembo GT | M4 4-Piston Caliper, and GTS4 = Genuine Brembo GT | S4 4-Piston Caliper. The rear caliper and rotor sizing are matched to the front package to support brake balance and straight-line stability during high-energy stops.
Front & rear, engineered together: StopFlex engineers the front and rear together so piston area, rotor diameter, hat offset, and line routing are not combined as a front-only guess. On the W251 R-Class, a matched 380 mm front/rear carbon-ceramic system avoids the brake-bias and pedal-feel problems that can come from mixing a large front upgrade with an unverified rear setup.
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 — 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 — 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 |
FAQ
Will this kit fit my exact R350, R500, or R63 W251?
Fitment is confirmed by exact model, trim, year, and wheel data before production. StopFlex does not assume that every W251 R-Class uses the same brackets, hat offsets, or caliper mounting, especially when comparing standard R350/R500 models with the R63 AMG.
What wheel size do I need for the 380 mm setup?
This kit requires 19-inch or larger wheels because the largest rotor is 380 mm. Barrel clearance and spoke clearance still need to be checked against the chosen Brembo 6-piston front and 4-piston rear calipers.
Will the parking brake still work?
The W251 R-Class does not use a factory electronic parking brake. StopFlex confirms the rear parking-brake arrangement during fitment review so the mechanical parking-brake function is accounted for in the rear package.
Why move this R-Class from iron brakes to carbon ceramic?
Carbon-ceramic rotors reduce brake dust, resist heat-related fade, and remove rotating unsprung mass compared with similarly sized iron rotors. On a heavy R350, R500, or R63, the 380 mm rotor package is aimed at repeated high-speed braking and cleaner open-wheel fitments.
Need Fitment Confirmation?
Send the exact vehicle details, current rotor sizes, and caliper type before ordering.
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