Mercedes-Benz AMG C63 W205 (2014-2021) Prepreg Dry Carbon Fiber Rear Diffuser

Engineered for Mercedes-AMG C63 W205 (2014-2021) owners who demand racing-grade quality, this Prepreg Dry Carbon Fiber Rear Diffuser transforms the rear of your AMG sedan/coupe with track-grade aggression while supporting aerodynamic performance. Manufactured in Europe and quality-controlled by BYC Performance, this Mercedes C63 carbon rear diffuser bolts directly to OEM mounting points — no cutting, no drilling, no modification required.

If you're building a serious Mercedes C63 tuning project and need a part that exceeds the factory plastic diffuser, this dry carbon rear diffuser is built for you. Autoclave-cured prepreg carbon fiber is noticeably lighter than wet-lay carbon parts, with far superior structural integrity and outstanding UV resistance. Engineered to match the AMG racing DNA of the C63's 4.0L V8 biturbo M177 engine (469-503 hp), this aggressive geometry is the ideal upgrade for both track and street.

Key Features

• Prepreg Dry Carbon Technology: Pre-impregnated carbon plies cured in autoclave under high heat and pressure ensure homogeneous resin distribution and a more consistent weave.
• AMG GT3-Inspired Design: Sharp diffuser channels matching race-bred aesthetics. Noticeably lighter than factory plastic.
• Race-Grade Strength: Carbon fiber offers very high strength for its weight.
• Aerodynamic Performance: Optimized channels accelerate underbody airflow and contribute to downforce at speed.
• 2x2 Twill Carbon Weave: Authentic carbon fiber pattern under a high-gloss UV-protective clear coat.
• Direct OEM Fit: Plug & play installation on factory Mercedes-AMG C63 W205 (2014-2021) rear bumper.
• UV & Chemical Protection: Long-life clear coat protects against fading, cracking, fuel splash, and road tar.

Prepreg Dry Carbon vs. Wet Carbon

Most aftermarket carbon parts use wet lay-up, where resin is applied by hand and cured at room temperature — leaving voids and inconsistent weight. Prepreg (dry) carbon:

• Cured in autoclave under heat and pressure → a more consistent weave
• A controlled resin ratio → lighter and stronger
• The production method widely chosen in motorsport
• Minimal UV fading over years

Vehicle Fitment

This Mercedes C63 rear diffuser fits:

• Mercedes-AMG C63 Sedan (W205, 2014-2018 pre-facelift) — M177 4.0L V8 biturbo, 469 hp
• Mercedes-AMG C63 S Sedan (W205, 2014-2018 pre-facelift) — 503 hp
• Mercedes-AMG C63 Coupe (C205, 2015-2018 pre-facelift) — 469 hp
• Mercedes-AMG C63 S Coupe (C205, 2015-2018 pre-facelift) — 503 hp
• Mercedes-AMG C63 / C63 S Sedan & Coupe facelift (2018-2021)

Important notes:

• NOT compatible with non-C63 W205 trims (C200/C220/C300/C43) — C63 has a different rear bumper geometry.
• NOT compatible with W206 (2022+) next-gen C-Class.
• NOT compatible with previous-gen W204 C63 (2007-2014).
• This version does NOT include LEDs — an LED-equipped version is available separately in our catalog.

Technical Specifications

• Material: Prepreg Carbon Fiber (2x2 Twill Weave)
• Manufacturing: Autoclave Cure
• Finish: High-Gloss Clear UV-Protective Resin
• Color: Natural carbon weave black
• Origin: Europe

Installation Notes

Direct replacement of the factory part. Professional installation recommended:

1. Raise the vehicle and remove rear bumper underbody screws.
2. Detach the OEM plastic diffuser from clips and bolts.
3. Test-fit the carbon diffuser for alignment.
4. Secure with supplied hardware (to the manufacturer's recommended torque).
5. Verify exhaust tips are centered (C63 quad outlets).

Care & Maintenance

Wash with pH-neutral car shampoo. Apply carbon-safe sealant every 6 months. Keep pressure washer nozzle at least 30 cm from surface.

FAQ

Does this fit non-C63 W205 (C200/C300)?
No. C63 and non-C63 W205 trims have different rear bumper geometry. A separate carbon rear diffuser for non-C63 W205 is available in our catalog.

Compatible with W206 (2022+)?
No. W206 is a new generation with different chassis and rear bumper geometry.

Compatible with W204 C63 (2007-2014)?
No. W204 is the previous generation.

Sedan vs Coupe difference?
No fitment difference. C63 Sedan (W205) and C63 Coupe (C205) share the same rear bumper underbody geometry; this diffuser fits both.

Does this diffuser have LEDs?
No, this is the standard (non-LED) version. An LED-equipped version is available separately in our catalog.

Will rain damage dry carbon parts?
No. Autoclave-cured prepreg carbon is fully waterproof and weather-resistant.

Shipping time?
In-stock items ship within 1-3 business days via partner couriers. International shipping available.

Warranty?
BYC Performance offers a 12-month manufacturer warranty.

Why BYC Performance?

BYC Performance is a Turkey-based performance tuning specialist sourcing premium carbon fiber parts from leading European manufacturers. Our catalog includes Mercedes AMG carbon parts, C63 carbon diffusers, BMW M carbon diffusers, Audi RS carbon spoilers, and many more high-quality carbon components.