BMW 4 Series F32 F33 F36 3D Style Carbon Fiber Quad Exhaust Rear Diffuser 2013-2020

Upgrade the rear styling and aerodynamic performance of your 2013-2020 BMW 4 Series F32, F33, or F36 with this 3D style carbon fiber quad exhaust rear diffuser. Designed specifically for M-Tech equipped models, this upgrade enhances the lower rear bumper with a more aggressive and performance-focused appearance.

The 3D style diffuser features sculpted fins and a quad exhaust layout, giving your vehicle a wider and more dynamic stance. Precision engineered for the F3X 4 Series platform, it integrates seamlessly with the factory rear bumper for a clean OEM+ look while adding motorsport-inspired design elements.

Constructed from high-quality carbon fiber, this diffuser offers lightweight durability and a consistent weave finish. Available in multiple carbon fiber construction options, it is ideal for enthusiasts seeking enhanced rear styling and improved visual depth.

Product Specifications

Key Features

• Designed for 2013-2020 BMW 4 Series F32, F33, and F36 models
• 3D style rear diffuser with aggressive quad exhaust configuration
• Specifically designed for M-Tech rear bumper applications
• Enhances rear-end aerodynamics and visual depth
• Constructed from high-quality carbon fiber materials
• Lightweight and durable for long-term performance use
• Precision-molded for OEM-style fitment and alignment
• Sculpted fins create a wider and more aggressive stance
• Available in multiple carbon fiber construction options
• Ideal for street, show, and performance builds

Configuration Options

• CFRP – Carbon fiber reinforced polymer for lightweight strength and premium finish
• FGCF – Fiberglass base with carbon fiber overlay for cost-effective styling

Package Includes

• Rear quad exhaust diffuser

Note: This diffuser is designed for M-Tech rear bumpers only. Professional installation is recommended for proper fitment and alignment.

Installation

• Direct replacement or hardware-mounted installation
• Designed to fit factory M-Tech rear bumper mounting points
• No major modification required
• Professional installation recommended

Fitment

• 2013-2020 BMW 4 Series F32 Coupe (M-Tech)
• 2013-2020 BMW 4 Series F33 Convertible (M-Tech)
• 2013-2020 BMW 4 Series F36 Gran Coupe (M-Tech)

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.