UNIT 17 3-Piece Carbon Fiber Rear Diffuser for BMW G80 M3 / G82 M4

UNIT 17 3-Piece Carbon Fiber Rear Diffuser for BMW G80 M3 / G82 M4

$1,399.00

Fitment: M3 Fitment

M3 Fitment M4 Fitment

Fitment GuaranteedShop Install AvailablePackage Protection

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UNIT 17 3-Piece Carbon Fiber Rear Diffuser – BMW G80 M3 / G82 M4

Three Pieces. Factory Mounting. Zero Cutting.

The UNIT 17 3-piece rear diffuser system includes a center blade and two rear corner extensions, giving the rear end a complete wide-body-inspired appearance rather than the unfinished look of a center-only diffuser. Designed to enhance the aggressive styling of the G8X platform while maintaining OEM-style integration, this diffuser system delivers a bold motorsport-inspired rear profile with factory-style fitment.

Built from premium prepreg dry carbon fiber and finished in a deep gloss clear coat, the diffuser perfectly matches the rest of UNIT 17’s G8X aero lineup for a cohesive and high-end appearance.

Construction

Prepreg Dry Carbon Fiber

Constructed from premium prepreg dry carbon fiber for lightweight strength and exceptional rigidity.

Gloss Clear Coat Finish

Finished with a UV-resistant high-gloss clear coat for long-lasting shine and protection against fading or discoloration.

Premium OEM+ Finish

Built to the same material and finish standards as the rest of UNIT 17’s G8X aero collection.

Design

Complete 3-Piece Rear Aero System

Includes a center diffuser blade and two rear corner extension pieces for a fully finished rear-end appearance.

Wide-Body Inspired Styling

Creates a more aggressive and complete lower rear profile compared to center-only diffuser designs.

OEM++ Motorsport Aesthetic

Sharp aerodynamic lines and aggressive contours enhance the visual character of the G8X platform.

UNIT 17 Exclusive Design

Designed specifically for the G80 M3 and G82 M4 platforms with precise OEM-style integration.

What’s Included

One center diffuser panel
Two rear corner extension pieces
Sold as a complete 3-piece set

Installation

Utilizes factory mounting points throughout
No drilling or cutting required
Professional installation recommended

Fitment

BMW G80 M3 Sedan (2021+)
BMW G82 M4 Coupe (2021+)

🚨 Note: M3 and M4 rear bumper geometry differs. Please select your model correctly at checkout.

Package Protection

Every CenCal order is eligible for Package Protection, powered by Redo. It is selected by default at checkout and covers your shipment against loss, theft, and damage in transit.

What it covers:

Lost packages confirmed by the carrier
Stolen packages marked as delivered but not received
Items that arrive broken or damaged in transit

Resolution: Approved claims receive a full replacement at no cost. For damage claims, you keep the damaged item and receive a brand new replacement.

Claims must be filed within 7 days of the delivery date. See the full policy or email support@cencalmotorsport.com if you need help.

If protection is removed at checkout, CenCal cannot file a claim or accept responsibility for shipping issues.

UNIT 17 3-Piece Carbon Fiber Rear Diffuser for BMW G80 M3 / G82 M4

$1,399.00