Seibon RD16FDFO-OE OE-Style Carbon Fiber Rear Diffuser for Ford Focus RS

The Seibon RD16FDFO-OE is an OE-style carbon fiber rear diffuser designed as a direct-fit upgrade for the 2016–2018 Ford Focus RS. Engineered to replicate the factory diffuser profile in genuine carbon fiber, this component delivers an aggressive, race-inspired aesthetic while reducing weight compared to the stock bumper lip — no painting required thanks to the show-ready gloss finish.

Construction & Materials:

• Genuine carbon fiber construction — hand-crafted using premium materials for a consistent, high-quality weave pattern
• One-piece carbon sheet design — built into the mold over a fiberglass skeleton for superior strength without broken lines or split seams
• Optimized carbon/resin ratio — maximizes stiffness and structural strength without adding unnecessary weight
• Glossy UV-resistant clear coat finish — chip-resistant and flake-resistant for a durable, wet-look appearance that requires no additional painting

Aerodynamics & Performance:

• OE-style diffuser profile improves rear downforce for enhanced high-speed stability and traction
• Lightweight carbon fiber construction can reduce weight by up to 50% compared to the factory plastic component
• Race-inspired design that complements the Focus RS performance platform

Quality Assurance:

• Every component undergoes multi-step quality control inspection before leaving the facility
• Professional installation by a technician familiar with aftermarket carbon fiber components is recommended
• Minor fitment adjustments may be required as part of the normal installation process — pre-fit before any painting

The Seibon RD16FDFO-OE rear diffuser is backed by Seibon's reputation for precision carbon fiber body components, built by a production team with over 20 years of carbon fiber manufacturing expertise. Seibon Carbon is a proud member of SEMA and a preferred brand among professional drivers and competitive motorsport enthusiasts.