BMW G80 G82 M3 M4 Carbon Fiber 7 Piece Race Diffuser 2021-Up

Upgrade the rear-end styling and aerodynamic profile of your 2021-Up BMW G80 M3 or G82 M4 with this carbon fiber 7 piece race diffuser. Designed for a bold performance-inspired appearance, this diffuser kit adds a more aggressive rear profile while enhancing airflow around the lower bumper area.

The race diffuser design is made to fit over the OEM muffler with no cutting or drilling required. It is also compatible with aftermarket exhaust systems, though longer bolts may be required to clear aftermarket exhaust piping depending on the setup.

Constructed from 100% carbon fiber with a 2x2 weave and high gloss clear coat, this diffuser provides lightweight strength, premium styling, and a motorsport-inspired finish. The complete 7 piece kit includes the center diffuser, center valence, side valence pieces, rear side bumper pieces, and tow cap.

Product Specifications

Key Features

• Designed for 2021-Up BMW G80 M3 and G82 M4 models
• 7 piece carbon fiber race diffuser kit
• Enhances rear airflow and aggressive performance styling
• Designed to fit over the OEM muffler
• Compatible with aftermarket exhaust systems with possible longer bolt requirement
• 100% carbon fiber construction with 2x2 weave
• High gloss clear coat finish for a premium motorsport appearance
• No cutting or drilling required for standard installation

Configuration Options

• 7 piece race diffuser configuration
• 100% carbon fiber 2x2 weave
• High gloss clear coat finish

Package Includes

• 1 center diffuser
• 1 center valence
• 2 side valence pieces
• 2 rear side bumper pieces
• 1 tow cap

Note: Designed to fit over the OEM muffler. Aftermarket exhaust systems may require longer bolts to clear aftermarket exhaust piping. Professional installation is recommended.

Installation

• Installs onto the rear bumper and diffuser area
• No cutting or drilling required for standard installation
• Test fitting is recommended before final installation
• Longer bolts may be required when used with some aftermarket exhaust systems
• Professional installation is recommended for best results

Fitment

• 2021-Up BMW G80 M3
• 2021-Up BMW G82 M4

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.