[Pre-order] BMW G8X M3/M4 Rear Diffuser

$3,100.00 $3,450.00

LIMITED TIME ONLY. Pre-order and get an additional 10% off.

Make that quad exhaust pop even more with the ADRO carbon fiber rear diffuser for the G8X BMW M3/M4. Featuring a more aggressive design, carefully engineered aero, and a beautiful carbon fiber finish, this is by far the highest quality and most aggressive rear diffuser currently available for the G8X platform.

Learn more about our BMW G8X M3/M4 Facelift Kit



M3: A14A30-1301
M4: A14A40-1301

Compatible with:

2021-2023 BMW M4 Standard
2021-2023 BMW M4 Competition
2023 BMW M4 CSL
2021-2023 BMW M3 Standard
2021-2023 BMW M3 Competition

Kit includes:

Rear Diffuser


Prepreg ("Dry") Carbon Fiber



M3: 721 mm x 1,760 mm x 276 mm
M4: 698 mm x 1,860 mm x 300 mm

What’s in the box:

Rear Diffuser
3M Tape

Installation guide:

Professional installation only





You can return new and unopened items within 30 days from the original date of purchase. 

Please refer to our full Returns Policy.

Free shipping to the lower 48 states.

Please allow 1 to 3 business days for your order to process. In-stock orders are shipped out via UPS Ground OR Pilot Freight within 48-72 hours of order processing and confirmation of payment. You will be notified via email with a tracking number when your package has shipped.

For orders to AK, HI, and other international locations, please contact us at sales@adro.com prior to ordering with your location and the products you wish to purchase. We will provide a shipping quote based on combined size, weight, value, and destination.  

Please refer to our full Shipping & Returns.