2019-2022 BMW 3 Series G20 G28 BKSS Style Carbon Fiber Rear Diffuser (With 4 Exhaust tips)

Transform the rear profile of your BMW 3 Series with this BKSS Style carbon fiber rear diffuser. Designed specifically for G20 and G28 models equipped with a quad exhaust setup, this aerodynamic upgrade adds a lower, wider, and more aggressive appearance beneath the factory rear bumper.

The sculpted diffuser fins and integrated LED light create a bold, motorsport-inspired focal point while adding greater visual depth to the rear end. Its quad exhaust outlet configuration complements performance-style exhaust conversions and enhances the vehicle’s aerodynamic presence.

Available in CFRP, FGCF, and lightweight DryCF material options, this rear diffuser combines premium carbon fiber styling with vehicle-specific fitment. Designed for 2019-2022 BMW 3 Series G20 and G28 models with four exhaust tips, each package includes one BKSS Style carbon fiber rear diffuser with an integrated LED light; exhaust tips are not included.

Product Specifications

Key Features

• BKSS Style rear diffuser designed for the BMW 3 Series G20 and G28
• Designed exclusively for vehicles with a quad exhaust configuration
• Creates a lower, wider, and more aggressive rear-end appearance
• Integrated LED light adds a distinctive motorsport-inspired accent
• Sculpted diffuser fins add visual depth beneath the rear bumper
• Available in CFRP, FGCF, and lightweight DryCF material options
• Complements performance-style exhaust conversions and exterior upgrades
• Designed as a replacement for the compatible factory rear diffuser
• Includes one carbon fiber rear diffuser with LED light
• Exhaust tips are not included

Configuration Options

• CFRP: Carbon fiber reinforced polymer with a traditional woven carbon fiber appearance
• FGCF: Forged carbon fiber with a distinctive randomized carbon pattern
• DryCF: Lightweight dry carbon fiber construction with a refined motorsport-inspired finish

Package Includes

• One BKSS Style carbon fiber rear diffuser
• One integrated LED light

Note: Exhaust tips are not included. This diffuser is designed for compatible BMW 3 Series G20 and G28 models with a quad exhaust setup. Professional installation and complete test fitting are recommended. Confirm the vehicle’s rear bumper style, exhaust layout, parking sensor configuration, and available electrical connection before ordering.

Installation

• Designed to replace the compatible factory rear diffuser
• Professional installation is recommended for proper alignment and LED wiring
• Remove the factory diffuser carefully and retain compatible mounting hardware
• Test fit the carbon fiber diffuser before completing final installation
• Connect the integrated LED light to a suitable vehicle lighting circuit
• Additional wiring, connectors, coding, hardware, adhesive, or minor adjustments may be required
• Confirm proper clearance around all four exhaust tips and surrounding bumper components
• Verify secure mounting and correct LED operation before driving

Fitment

• 2019-2022 BMW 3 Series Sedan G20 with quad exhaust tips
• 2019-2022 BMW 3 Series Long-Wheelbase Sedan G28 with quad exhaust tips
• Verify compatibility with the vehicle’s specific rear bumper and exhaust configuration before ordering

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.