2019 - 2025 Audi RS6 Avant C8 & RS7 Quattro BKSS Style Rear Diffuser

Transform the rear profile of your Audi RS6 Avant or RS7 Quattro with this BKSS style carbon fiber rear diffuser. Designed to create a lower and more aggressive appearance, this exterior upgrade adds race-inspired definition beneath the compatible factory rear bumper.

The sculpted BKSS style design features pronounced fins and an integrated LED light that adds a modern motorsport-inspired accent to the rear end. Its contoured profile enhances the vehicle’s aerodynamic presence while complementing the wide stance and performance-focused styling of the C8 platform.

Available in CFRP, FGCF, and DryCF material options, this rear diffuser combines lightweight construction, exterior durability, and premium carbon fiber styling. Designed for 2019-2025 Audi RS6 Avant C8 and RS7 Quattro models, each package includes one rear diffuser with an integrated LED light.

Product Specifications

Key Features

• BKSS style rear diffuser designed for Audi RS6 Avant and RS7 Quattro models
• Fits compatible 2019-2025 Audi C8 applications
• Creates a lower and more aggressive rear-end appearance
• Features an integrated LED light for a modern motorsport-inspired accent
• Available in CFRP, FGCF, and DryCF material options
• Offers woven, forged, and dry carbon fiber configurations
• Lightweight construction with durable exterior performance
• Follows the compatible rear bumper contours for an integrated appearance
• Enhances the vehicle’s aerodynamic and visual presence
• Complements side skirts, trunk spoilers, and other carbon fiber upgrades

Configuration Options

• CFRP: Carbon fiber-reinforced polymer construction offering lightweight strength and a premium woven carbon fiber appearance
• FGCF: Forged carbon fiber construction featuring a distinctive non-uniform pattern and performance-inspired finish
• DryCF: Dry carbon fiber construction offering reduced weight, high rigidity, and a refined premium finish

Package Includes

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

Note: Confirm the vehicle’s exact model, model year, C8 chassis, factory rear bumper design, exhaust outlet configuration, parking sensor arrangement, and any installed aftermarket rear components before ordering. This listing includes the rear diffuser and LED light only. Exhaust tips, reflectors, wiring harnesses, switches, relays, brackets, mounting hardware, tape, adhesive, and additional exterior trim are not included unless stated separately.

Installation

• Designed to replace the compatible factory lower rear diffuser component
• Professional body shop and automotive electrical installation are strongly recommended
• Test fit the diffuser before drilling, trimming, bonding, wiring, or completing final installation
• Transfer compatible factory reflectors, sensors, brackets, clips, retainers, and related components where required
• Connect the LED light through an appropriate fused circuit, wiring harness, switch, or relay as required
• Minor drilling, trimming, adjustment, fabrication, wiring modification, or additional hardware may be required
• Confirm adequate clearance around the exhaust outlets, underbody panels, and surrounding bumper components
• Verify secure mounting, proper LED operation, and sufficient ground clearance before driving

Fitment

• 2019-2025 Audi RS6 Avant C8
• 2019-2025 Audi RS7 Quattro C8 Sportback
• Verify the factory rear bumper, exhaust, sensor, and wiring 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.