UNIT 17 3-Piece Carbon Fiber Rear Diffuser for BMW G80 M3 / G82 M4
Category Rear Diffusers
Brand CenCal Motorsport
Order status In stock - ready to ship
Build data

Specs that matter for this part

Hardware

Key hardware

See product description for included components and manufacturer details.

Validation

Install notes

DIY-friendly; professional help recommended for custom setups.

Requirement

Before checkout

Use the variant selector and product description to match the correct application before ordering.

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.

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