BMW G82 G83 M4 3D Style Carbon Fiber Replacement 3PCS Rear Diffuser Apron 2021-Up

Upgrade the rear profile of your BMW G82 or G83 M4 with this 3D Style Carbon Fiber 3-Piece Replacement Rear Diffuser Apron. Designed for 2021-2026 BMW M4 coupe and convertible models, this kit replaces the factory rear diffuser with a full carbon fiber assembly for a sharper and more aggressive motorsport-inspired appearance.

The 3-piece layout includes a center rear diffuser section along with left and right rear apron extensions, giving the M4 a wider, more planted stance around the exhaust area. Deep fins, sculpted channels, and bold aero contours help enhance the rear bumper design while complementing the factory body lines.

Constructed from premium carbon fiber, this replacement diffuser kit provides lightweight strength and a refined gloss carbon fiber finish. The high-gloss UV-resistant clear coat helps protect the carbon weave from fading, yellowing, and environmental exposure while maintaining a deep performance-focused appearance.

Product Specifications

Key Features

• Designed for 2021-2026 BMW G82 and G83 M4 models
• 3D style carbon fiber replacement rear diffuser apron kit
• Includes center rear diffuser with left and right rear side apron extensions
• Full carbon fiber construction for lightweight strength and premium styling
• Gloss carbon fiber finish adds a deep performance-focused appearance
• High-gloss UV-resistant clear coat helps protect against fading and yellowing
• Deep fins and sculpted channels sharpen the rear bumper profile
• Creates a wider and more aggressive rear stance around the exhaust area
• Designed to replace the original rear diffuser assembly
• Molded to align with factory body lines and mounting points
• Compatible with coupe and convertible M4 models
• Reuses original factory mounting hardware

Configuration Options

• Standard Configuration: 3-piece carbon fiber rear diffuser apron replacement kit
• Carbon Finish Setup: Gloss carbon fiber with UV-resistant clear coat
• Installation Setup: Direct replacement installation using factory mounting points and original hardware
• Vehicle Setup: Designed for compatible BMW G82 M4 Coupe and G83 M4 Convertible models

Package Includes

• BMW G82 G83 M4 3D Style Carbon Fiber Rear Diffuser
• Pair of BMW G82 G83 M4 3D Style Carbon Fiber Rear Side Aprons

Note: Hardware is not included. Reuse your original factory hardware for proper installation. Confirm vehicle year, chassis, trim, rear bumper configuration, exhaust layout, and diffuser mounting points before ordering and installation. Professional installation is recommended. Test fitting is recommended before final installation.

Installation

• Direct replacement installation
• Replaces the original rear diffuser assembly
• Uses factory mounting points
• Reuse original factory hardware during installation
• Installation manual is not included
• Professional installation is recommended for proper alignment and secure fitment
• Test fitting is recommended before final installation

Fitment

• 2021 BMW M4 Base Coupe
• 2021 BMW M4 Competition Coupe
• 2022 BMW M4 Base Coupe
• 2022 BMW M4 Competition Coupe
• 2022 BMW M4 Competition Convertible
• 2022 BMW M4 Competition xDrive Coupe
• 2022 BMW M4 Competition xDrive Convertible
• 2023 BMW M4 Base Coupe
• 2023 BMW M4 CSL Coupe
• 2023 BMW M4 Competition Coupe
• 2023 BMW M4 Competition Convertible
• 2023 BMW M4 Competition Heritage Coupe
• 2023 BMW M4 Competition xDrive Coupe
• 2023 BMW M4 Competition xDrive Convertible
• 2024 BMW M4 Base Coupe
• 2024 BMW M4 Competition Coupe
• 2024 BMW M4 Competition Convertible
• 2024 BMW M4 Competition xDrive Coupe
• 2024 BMW M4 Competition xDrive Convertible
• 2025 BMW M4 Base Coupe
• 2025 BMW M4 CS Coupe
• 2025 BMW M4 Competition Coupe
• 2025 BMW M4 Competition xDrive Coupe
• 2025 BMW M4 Competition xDrive Convertible
• 2026 BMW M4 Base Coupe
• 2026 BMW M4 CS Coupe
• 2026 BMW M4 Competition Coupe
• 2026 BMW M4 Competition xDrive Coupe
• 2026 BMW M4 Competition xDrive Convertible

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.