Mercedes-Benz AMG A45 W176 | Prepreg Dry Carbon Fiber Rear Diffuser

Mercedes-Benz AMG A45 W176 (2013-2018) Prepreg Dry Carbon Fiber Rear Diffuser

Engineered for Mercedes-AMG A45 W176 (2013-2018) owners who demand racing-grade quality, this Prepreg Dry Carbon Fiber Rear Diffuser transforms the rear of your hot-hatch with track-grade aggression while sharpening its aerodynamic character. Imported from leading manufacturers around the world and quality-controlled by BYC Performance, this W176 carbon rear diffuser bolts directly to OEM mounting points, no cutting, no drilling, no modification required.

If you're building a serious A45 W176 tuning project and need a part that exceeds the factory plastic diffuser in both presence and finish, this dry carbon rear diffuser is built for you. Autoclave-cured prepreg carbon fiber is noticeably lighter than wet-lay carbon parts and far more durable. The W176 A45 AMG's legendary M133 2.0L turbo engine (360-381 hp) was once the world's most powerful production 4-cylinder. Your rear diffuser should match that legacy.

Key Features

• Prepreg Dry Carbon Technology: Pre-impregnated carbon plies cured in an autoclave under high heat and pressure ensure homogeneous resin distribution and a more consistent weave.
• Aggressive Diffuser Geometry: Multi-fin diffuser design inspired by DTM and CLA45 race cars. Noticeably lighter than the factory plastic part.
• High Strength: Carbon fiber offers very high strength for its weight. Resists stone chips and light contact.
• Aerodynamic Character: Optimized diffuser channels guide underbody airflow and support rear-axle stability 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-AMG A45 W176 (2013-2018) rear bumper 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. Prepreg (dry) carbon:

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

Installation Notes

Installing the A45 W176 carbon diffuser is a direct replacement of the factory part. General steps:

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 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 W177 A45 (2018+)?
No. The W177 generation has different rear bumper and diffuser geometry. A separate W177 carbon diffuser is available in our catalog.

Compatible with CLA45 C117?
No. The C117 CLA uses a different rear bumper. A separate C117 carbon diffuser is available.

Fits standard A180/A200 models?
Only compatible with AMG-Line rear bumpers. Fitment on standard A-class bumpers cannot be guaranteed.

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. Our catalog includes Mercedes-AMG carbon parts, A45 W176 carbon diffusers, BMW M carbon parts, Porsche carbon spoilers, and many more high-quality carbon components.