Porsche 911 (991 / 991.2 Coupé) | Prepreg Dry Carbon Fiber Roof Spoiler

Porsche 911 (991 / 991.2 Coupé, 2012-2019) Prepreg Dry Carbon Fiber Roof Spoiler

Engineered for Porsche 911 991 / 991.2 Coupé owners, this Prepreg Dry Carbon Fiber Roof Spoiler (rear window upper spoiler) flattens airflow over the rear glass to reduce rear-axle lift and adds an aggressive GT silhouette. Quality-controlled by BYC Performance and mounted with 3M VHB tape directly to the OEM rear-window upper edge, no cutting or drilling required.

In the 911 Coupé's rear-engine flat-6 aerodynamics, airflow over the rear glass moves toward the active rear spoiler area uncontrolled. A roof spoiler smooths this flow, increases rear spoiler efficiency, and improves rear-axle balance at speed. All Coupé trims from the 991.2 Carrera 3.0L turbo to the 580 hp Turbo S and 500 hp GT3 NA share the same roof and rear-glass geometry. Autoclave-cured dry carbon is far stronger than wet-lay parts.

Key Features

• Prepreg Dry Carbon Technology: Autoclave cure under high heat and pressure; a more consistent weave.
• Aerodynamic Flow Smoother: Flattens airflow over the rear glass, reduces rear lift.
• GT Silhouette: Brings race-car profile to the Coupé roofline; GT3 / GT2 RS aesthetic.
• 3M VHB Tape Mount: No cutting or drilling; adheres to the OEM rear-window upper edge.
• 2x2 Twill Carbon Weave: Deep carbon pattern under a high-gloss UV-protective clear coat.
• Lightweight: Noticeably lighter and stronger than typical ABS/plastic roof spoilers.
• UV & Weather Protection: Clear coat prevents fading and cracking.

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

Most aftermarket carbon parts are made using wet lay-up, with hand-applied resin cured at room temperature. Prepreg dry carbon:

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

Installation Notes

1. Clean the upper rear-window edge with isopropyl alcohol and dry fully.
2. Dry-fit the spoiler before peeling the 3M tape liner.
3. Install at surface temperature 18-25°C.
4. Remove tape liner, center the spoiler, press firmly into place.
5. Avoid washing the car for 24 hours so the adhesive can reach full strength.

Care & Maintenance

Wash with pH-neutral car shampoo. Apply carbon-safe sealant every 6 months. Keep pressure washer 30 cm away and avoid direct spray on the tape edge.

FAQ

Does this fit the 992 (2020+)?
No. 992-generation roof and rear-glass geometry is different.

Does this fit the 997?
No. The 997 is the previous generation.

Compatible with Cabriolet or Targa?
No. Cabriolet has a folding soft top and Targa has a glass semi-open roof. Neither has a fixed Coupé glass roof.

Does a roof spoiler make a real aerodynamic difference?
Yes. It smooths airflow over the rear glass, reduces rear lift, and improves active-spoiler efficiency.

How durable is the 3M tape?
3M VHB is a professional automotive standard; holds firmly through high speeds and car washes.

Will it damage paint if removed?
If removed correctly at proper temperature with a heat gun, it lifts off without paint damage.

Shipping time?
In-stock items ship in 1-3 business days. 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 Porsche 911 carbon parts, Porsche 718 carbon diffusers, BMW M carbon components, Audi RS carbon spoilers, and more.