GT4 Style Carbon Fiber Rear Bumper Diffuser Lip for Porsche Boxster Cayman 981 13-15 by Stratec Systems

Enhance the rear-end styling and aerodynamic character of your Porsche 981 with the STRATEC™ Carbon Fiber GT4 Style Rear Diffuser, engineered specifically for the 2013–2015 Porsche Cayman and Boxster. Drawing inspiration from GT4 motorsport design, this rear diffuser delivers a more aggressive, track-inspired appearance while maintaining a clean OEM-plus fit and finish.

Constructed from high-quality carbon fiber, the STRATEC™ rear diffuser is lightweight, durable, and precision-molded for accurate alignment with the factory rear bumper. The GT4-style fins are designed to help manage airflow underneath the vehicle, contributing to improved rear stability and a more purposeful stance without compromising everyday drivability.

Designed as a direct bumper diffuser lip upgrade, this component follows the factory bumper contours for seamless integration. A UV-resistant clear coat protects the carbon fiber surface, ensuring long-lasting gloss, durability, and resistance to environmental wear.

Key Features

• STRATEC™ carbon fiber construction

• GT4-style motorsport-inspired rear diffuser

• Lightweight aerodynamic bumper lip upgrade

• Improves airflow and rear-end stability

• OEM-style fitment with clean integration

• UV-resistant clear coat for long-lasting finish

Vehicle Fitment

• Porsche Cayman 981 (2013–2015)

• Porsche Boxster 981 (2013–2015)

The STRATEC™ Carbon Fiber GT4 Style Rear Diffuser is the ideal upgrade for Porsche 981 owners seeking a balanced combination of motorsport-inspired design, premium materials, and factory-aligned fitment.