Seibon 04-05 Subaru WRX/STi 10mm Wider Carbon Fiber Fenders

Seibon Carbon Fiber Fenders offer more than just show-stopping looks — they bring legitimate performance benefits to serious street and track builds. Whether you're shaving precious pounds off the front end or improving airflow for brake cooling and engine bay ventilation, Seibon’s fenders are engineered with functionality in mind. Each fender is constructed using aerospace-grade carbon fiber and precision-molded through a vacuum infusion process to maintain high structural integrity while minimizing weight.

Seibon fenders are not just replicas — they are often re-engineered with improved contours or added vents that serve a purpose. Integrated vents help reduce under-hood temperatures and pressure build-up at speed, aiding both cooling and aerodynamic stability. In aggressive builds, this can also reduce front-end lift and improve overall balance during high-speed cornering.

With an industry-leading UV-resistant gel coat and a clear carbon weave layout that’s second to none, Seibon ensures that every fender looks as good as it performs. These fenders are designed to match OEM fitment points for easier installation, and many include pre-drilled holes or molded tabs to retain factory mounting hardware and wheel liners.

Whether you're upgrading for weight savings, thermal management, or pure visual aggression, Seibon Carbon Fiber Fenders deliver on all fronts — making them a top-tier choice for both track machines and high-end street builds.

• Vacuum-infused aerospace-grade carbon fiber construction for maximum strength and weight reduction
• Functional venting (when applicable) to assist cooling and reduce pressure build-up under the hood
• UV-protected high-gloss finish to resist yellowing, cracking, or fading
• OEM fitment-friendly with factory mounting points and pre-drilled installation tabs
• Perfect for track-ready weight savings or high-end street builds seeking visual impact and performance