Porsche 718 Cayman/Boxster (982, 2016+) Prepreg Dry Carbon Fiber Triangular Rear Diffuser

Engineered for Porsche 718 Cayman/Boxster (982 chassis, 2016+) owners, this Prepreg Dry Carbon Fiber Triangular Rear Diffuser is the more aggressive, triangular-fin variant of our standard rear diffuser. It gives your mid-engine sports car motorsport-inspired deep channel lines and contributes to aerodynamic downforce. Manufactured in Europe and quality-controlled by BYC Performance, this Porsche 718 carbon triangular rear diffuser bolts directly to OEM mounting points - no cutting required.

If you are building a serious Porsche 718 tuning project and want a sharper, triangular-fin geometry closer to GT3 RS / GT4 RS styling than our standard diffuser, this dry carbon triangular rear diffuser is built for you. Autoclave-cured prepreg carbon is noticeably lighter, offers very high strength for its weight, and resists UV fading.

Key Features

• Prepreg Dry Carbon Technology: Autoclave-cured under high heat and pressure; controlled resin, a more consistent weave.
• Triangular Fin Geometry: Sharp triangular profile diffuser channels; more aggressive motorsport look than the standard version.
• Track DNA Design: Multi-channel diffuser accelerates underbody airflow and increases rear-axle downforce at speed.
• Weight Reduction: Noticeably lighter than the factory plastic part.
• 2x2 Twill Carbon Weave: Authentic carbon pattern under a high-gloss UV-protective clear coat.
• Direct OEM Fit: Plug and play installation on the 982 Cayman and Boxster rear bumper mounting points.
• UV and Chemical Protection: Long-life clear coat protects against fading, cracking, and exhaust heat.

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 - noticeably lighter
• The production method widely chosen in motorsport
• Minimal UV fading over years of use

Vehicle Fitment

This Porsche 718 triangular rear diffuser fits the following 982 chassis (2016+) models:

• Porsche 718 Cayman (2016+) - 2.0L flat-4 turbo, 300 hp
• Porsche 718 Cayman S (2016+) - 2.5L flat-4 turbo, 350 hp
• Porsche 718 Cayman GTS 2.5T / GTS 4.0 (2018+ / 2020+)
• Porsche 718 Cayman T (2019+)
• Porsche 718 Boxster (2016+) - 2.0L flat-4 turbo, 300 hp
• Porsche 718 Boxster S (2016+) - 2.5L flat-4 turbo, 350 hp
• Porsche 718 Boxster GTS 2.5T / GTS 4.0 (2018+ / 2020+)
• Porsche 718 Spyder / Boxster Spyder 4.0 (2019+) - verify trim before ordering
• Porsche 718 Cayman GT4 4.0 (2020+) - verify GT4-specific rear diffuser before ordering

Important notes:

• NOT compatible with the previous-generation 981 Cayman/Boxster (2013-2016).
• NOT compatible with the 718 Cayman GT4 RS (2022+), which ships with a motorsport-specific rear diffuser.
• This triangular version is the more aggressive alternative to our standard Rear Diffuser for buyers who prefer a clean OEM-style multi-channel profile.

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

Installing the Porsche 718 carbon triangular diffuser is a direct replacement of the factory part:

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 triangular diffuser for alignment.
4. Secure with supplied hardware to the manufacturer's recommended torque.
5. Verify exhaust tips are centered in diffuser cutouts.

Care and Maintenance

Wash with pH-neutral car shampoo. Clean triangular fin gaps gently with a soft brush. Apply carbon-safe sealant every 6 months. Keep pressure washer nozzle at least 30 cm from surface.

FAQ

Difference vs. the standard Rear Diffuser?
This triangular version offers sharp triangular-profile fin geometry - more aggressive GT3 RS / GT4 RS-style look. The standard version offers a clean OEM-following multi-channel profile.

Compatible with both Cayman and Boxster?
Yes. The 982-generation Cayman and Boxster share identical rear bumper and diffuser mounting points.

Does this fit the 981?
No. The 981 (2013-2016) and 982 have different rear bumper geometry.

Does this fit the GT4 RS?
No. The 718 Cayman GT4 RS (2022+) ships with a motorsport-specific rear diffuser; a dedicated GT4 RS diffuser is available separately.

Does this fit the Spyder or GT4?
4.0-engined Spyder and GT4 use the standard 982 rear bumper; verify trim-specific aero before ordering.

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

Shipping time?
In-stock items ship within 1-3 business days.

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 and supplying them to the Turkish market. Our catalog includes Porsche carbon parts, Porsche 911 carbon diffusers, Audi R8 carbon diffusers, BMW M3 carbon spoilers, and many more high-quality carbon components.