Mercedes-Benz AMG CLA C117 | Prepreg Dry Carbon Fiber Rear Diffuser

Mercedes-Benz AMG CLA C117 (2013-2019) Prepreg Dry Carbon Fiber Rear Diffuser

Engineered for Mercedes-Benz AMG CLA C117 first-generation (2013-2019) owners, this Prepreg Dry Carbon Fiber Rear Diffuser transforms the rear of your compact sedan with CLA45 AMG-grade aggression while contributing to aerodynamic performance. Made to factory-spec mounting tolerances by leading manufacturers around the world and quality-controlled by BYC Performance, this CLA C117 carbon rear diffuser bolts directly to OEM mounting points: no cutting, no drilling, no modification required.

If you're building a serious CLA C117 tuning project and need a part that exceeds the factory plastic diffuser in both performance and finish, this dry carbon rear diffuser is built for you. Autoclave-cured prepreg carbon fiber is noticeably lighter than wet-lay carbon parts, with superior structural integrity and outstanding long-term UV resistance. Engineered to match the DTM racing DNA of the CLA45 AMG's M133 2.0L turbo I4 (360-381 hp, 4MATIC AWD), this aggressive geometry diffuser is the ideal aesthetic and functional upgrade for both track and street use.

Key Features

• Prepreg (Dry) Carbon Technology: Pre-impregnated carbon plies cured in an autoclave under high heat and pressure ensure a more consistent weave.
• AMG-Inspired Geometry: Aggressive diffuser channels inspired by the CLA45 AMG and DTM race cars. Noticeably lighter than the factory plastic part.
• Race-Grade Strength: Carbon fiber offers very high strength for its weight. Resists stone chips and light contact.
• Aerodynamic Performance: Optimized diffuser channels accelerate underbody airflow and generate downforce at high speeds.
• 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 CLA C117 (2013-2019) mounting points.
• UV & Chemical Protection: Long-life clear coat protects against fading, cracking, fuel splash, and road tar.

Prepreg (Dry) Carbon vs. Wet Carbon: Which Is Better?

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

• Cured in an autoclave under high 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 of use

Installation Notes

Installing the CLA C117 carbon diffuser is a direct replacement of the factory part. Professional installation is 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. On CLA45, verify exhaust tips are centered in diffuser cutouts.

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 the Mercedes CLA C118 (2019+)?
No. C117 and C118 are different generations with completely different rear bumper geometry. A separate C118 carbon diffuser is available in our catalog.

Difference between CLA45 AMG and CLA250?
The rear diffuser mounting points are shared; this part fits both CLA45 AMG and standard AMG-pack CLA250/CLA220 trims. Contact support if there are small bumper-cut differences.

Compatible with the CLA Shooting Brake (X117)?
Yes. The X117 Shooting Brake wagon shares the same rear diffuser.

Difference between pre-facelift and facelift CLA C117?
No. The 2013-2016 pre-facelift and 2017-2019 facelift models share identical rear bumper and diffuser mounting points.

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. Parts sourced to order are delivered within 30 days of the order date at the latest.

Warranty?
Manufacturing defects are covered by a 24-month BYC warranty, in addition to your legal rights.

Why BYC Performance?

BYC Performance is a Turkey-based performance tuning specialist sourcing premium carbon fiber parts from leading manufacturers around the world and supplying them to the Turkish market. Our catalog includes Mercedes AMG carbon parts, CLA C117 carbon diffusers, C63 W205 carbon diffusers, BMW M3 carbon diffusers, and many more high-quality carbon components.