UNIT 17 Carbon Fiber Side Skirt Extensions – BMW G80 M3 / G82 G83 M4

Extend the Rocker. No OEM Removal.

These are undermount side skirt extensions — not M Performance-style replacements. Designed to mount beneath and extend beyond your existing OEM side skirts, they add a subtle low-profile winglet that visually widens the stance of the car without replacing or modifying your factory rocker panels.

The result is a sharper, lower, and more aggressive side profile while maintaining the clean OEM++ styling of the G8X platform.

Construction

Premium Carbon Fiber Construction

• Built from high-quality carbon fiber for lightweight durability and a refined motorsport appearance.

Gloss Carbon Finish

• Finished in a deep gloss clear coat for a premium OEM+ look.

Factory Pre-Drilled Mounting Holes

• Pre-drilled from the factory for a clean, repeatable, and straightforward installation process.

Design

Undermount Extension Design

• Mounts beneath the OEM side skirts rather than replacing them.

Integrated Winglet Profile

• Features a subtle flare winglet that extends beyond the factory rocker line for added visual width.

OEM++ Styling

• Adds a lower and more aggressive stance while maintaining the clean lines of the G8X chassis.

UNIT 17 Exclusive Design

• Unique design exclusive to UNIT 17.

Ships from New Jersey

• Domestic U.S. shipping available directly from New Jersey inventory.

Installation

• Hardware-mounted installation
• Pre-drilled mounting holes included
• Self-tapping screws included
• Professional installation recommended

Fitment

• BMW G80 M3 Sedan (2021+)
• BMW G82 M4 Coupe (2021+)
• BMW G83 M4 Convertible (2021+)