2014-2018 BMW i8 BZK Carbon Fiber Rear Diffuser

Upgrade your 2014-2018 BMW i8 with this BZK Style Carbon Fiber Rear Diffuser, designed to enhance rear-end styling and aerodynamic presence. It adds a sharper race-inspired finish to the lower rear bumper area.

This rear diffuser integrates cleanly with the i8’s futuristic rear design while helping create a more aggressive performance-focused profile. The design complements the vehicle’s sleek aerodynamic body lines.

Made from high-quality CFRP, FGCF, or DryCF carbon fiber, this diffuser is lightweight, durable, and UV-resistant for long-lasting exterior performance. It is ideal for completing a premium carbon fiber rear-end upgrade.

Product Specifications

Key Features

• Designed for 2014-2018 BMW i8 models
• BZK style rear diffuser adds a sharper race-inspired lower rear profile
• Carbon fiber construction provides lightweight durability and premium styling
• Available in CFRP, FGCF, and DryCF material options
• UV-resistant finish supports long-lasting exterior performance
• Enhances aerodynamic styling, airflow appearance, and rear-end road presence
• Precision-crafted to integrate with the i8’s futuristic rear bumper design

Configuration Options

• CFRP material option
• FGCF material option
• DryCF material option

Package Includes

• Carbon fiber rear diffuser

Note: Made-to-order options may require additional production time. Professional installation is recommended for proper alignment, secure mounting, and best overall fitment.

Installation

• Installs onto the lower rear bumper area
• Test fit before final installation
• Proper alignment is required for best fitment and finish
• Professional installation is recommended for best fit and finish

Fitment

• 2014-2018 BMW i8 I12 Coupe
• 2014-2018 BMW i8 I15 Roadster

United States: Free shipping available to the lower 48 states across all items. Other states will incur a shipping charge.

Worldwide: Free shipping is available for Complete Headlights, Taillights, DRLs. For custom headlight retrofits, carbon fiber products, and performance products, there will be a shipping charge.  

Please note:
• For Retrofits, you are purchasing a headlight modification service.
• If you select "Shipping own headlights to BayOptiks for modification", you are required to send us your headlights.
• If you choose "Purchase new OEM headlights", we will order and modify a new OEM headlight for you.
• Once your customizations are complete, we will ship it to you!

• Complete Headlights: 3-5 business days for order processing plus shipping time.
• Custom & Pre-Built Headlights: 6-8 weeks depending on the complexity and component availability.
• New OEM and cores: 6-8 weeks plus an additional 4-8 weeks as these are special orders base on the vehicle VIN due to different versions (North American, European, etc.)
• DRLs, Taillights, Brake Pads, and Carbon Fiber Aero: 3-5 business days for order processing, plus shipping time.
• Lens Replacements: 1-3 weeks plus shipping time.

Please note, we do not have control over the time frames of our vendors, manufacturers, and delivery services as they may delay processes in regards to components and shipment.