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Fully floating front rotors for the W205 C63 S braking system
EBC SG2F042 two-piece front rotors combine grooved cast-iron friction rings with aluminium bells and SD-Drive bobbins. Their 390 × 36 mm configuration is intended for the matching Mercedes-AMG brake system. This listing covers the manufacturer-confirmed W205 C63 S application below.
Key Features
- 390 mm diameter and 36 mm nominal new thickness, confirmed in EBC’s product release.
- Two-piece, fully floating construction allows controlled movement between the friction ring and bell as temperatures change.
- Grooved cast-iron friction surfaces with aluminium bells.
- SD-Drive bobbin system as specified by EBC.
- Front-axle application; select by original brake package as well as vehicle model.
Fitment
| Years | Make | Model | Application Notes |
|---|---|---|---|
| 2015–2021 | Mercedes-Benz | C63 AMG S | W205 sedan, 4.0L; front axle, matching 390 × 36 mm iron-rotor brake system. |
Confirm SG2F042 against the vehicle’s original rotor dimensions, caliper and brake option. This is not a blanket fitment claim for standard C63 models, earlier W204 cars, carbon-ceramic brake systems or every E63. Other AMG applications require exact vehicle and brake-package confirmation before ordering.
Specifications
| Detail | Value |
|---|---|
| Manufacturer | EBC Brakes Racing |
| Manufacturer Part Number | SG2F042 |
| Axle | Front |
| Construction | Two-piece, fully floating |
| Diameter | 390 mm |
| Nominal New Thickness | 36 mm |
| Minimum Thickness | 34 mm, as specified by EBC |
| Packaged Quantity | Pair (two rotors) |
| Friction Surface | Grooved cast iron |
| Bell Material | Aluminium |
| Drive System | SD-Drive bobbins |
The image represents EBC’s two-piece grooved rotor range. Exact bell geometry and dimensions are determined by the ordered part number; the photograph does not establish interchangeability.
See the factory rotor specifications and pair quantity. Check the markings and current EBC service instructions when inspecting wear limits.
What's Included
- One pair (two) assembled EBC front rotors, part number SG2F042.
- Brake pads, calipers and brake lines are separate unless expressly included in a distinct kit listing.
About EBC Brakes
EBC Brakes Racing develops brake components for performance road and competition applications. Its two-piece range uses separate friction rings and bells to accommodate thermal movement. Review the current exact-part fitment list and the manufacturer’s product specification release.
FAQ
What is the SG2F042?It is an EBC Racing 390 × 36 mm two-piece, fully floating front brake rotor product for the matching AMG brake configuration.
Does it fit every C63?No. The verified scope here is the 2015–2021 W205 C63 AMG S sedan with the matching iron-rotor brake package. Earlier generations and other brake options need separate verification.
What does fully floating mean?The friction ring and bell connect through bobbins that allow controlled relative movement during heating and cooling.
Are these drilled rotors?EBC specifies grooved cast-iron friction rings for this part. Drilled and grooved patterns are different designs.
Can these replace carbon-ceramic brakes?This listing does not establish a carbon-ceramic conversion. Confirm the exact system with EBC before changing rotor material or brake configuration.
Does this fit an E63 AMG?E63 compatibility requires exact vehicle and brake-package confirmation. Check the current EBC application lookup before ordering.
Are pads and calipers included?This is a rotor listing. EBC also offers separate kit combinations, which must be selected and ordered under their own exact kit numbers.
Is professional installation recommended?Yes. Rotor seating, runout, wheel clearance, fastener procedures and pad compatibility all require careful inspection.
Installation Instructions
- Verify SG2F042, the W205 application and the original brake package before disassembly.
- Inspect hubs, wheel bearings, calipers, pads and hoses, and compare all rotor mounting dimensions.
- Follow EBC’s instructions for rotor orientation and the vehicle manufacturer’s service and torque procedures.
- Check rotor runout, free rotation and clearance. Do not dismantle the floating assembly without EBC’s specific service instructions.
- Bed the installed pad and rotor combination according to EBC’s procedure and complete controlled brake checks before normal use.
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