PSM Diffuser 4-Piece Set Carbon Fiber for F80 M3 / F82–F83 M4

Transform the rear-end presence of your F8X with the PSM Diffuser 4-Piece Set Carbon Fiber, engineered to deliver aggressive styling, enhanced aerodynamics, and a true motorsport-inspired finish. Designed for perfect fitment on the F80 M3 and F82/F83 M4, this diffuser set gives your BMW a commanding rear profile that stands out on the street or at the track.

This premium 4-piece kit is in stock and ready to ship, packaged securely at our Oceanside, CA location for fast delivery.

Aggressive PSM-Inspired Design

• Signature PSM styling transforms the rear of your BMW

• Deep, sculpted fins provide a bold, track-ready aesthetic

• Creates a wider, more powerful look from all angles

High-Quality Carbon Fiber Construction

• Crafted from premium 2x2 carbon fiber

• Lightweight, strong, and built for long-term durability

• Finished in a deep gloss UV-protected clear coat to resist fading, yellowing, and wear

Complete 4-Piece Aero Kit

Includes everything needed for a full rear-end transformation:

• Main Rear Diffuser

• Left Side Extension

• Right Side Extension

• Rear Undertray Panel

All pieces integrate together to form a cohesive, aggressive aero package.

OEM-Plus Fitment

• Direct replacement for the factory diffuser

• Designed for precise OEM-like fitment with clean alignment

• No major modifications required

Professional installation is recommended for perfect alignment and secure mounting.

Fitment

Compatible with all BMW F8X models:

• 2015–2019 BMW F80 M3

• 2015–2020 BMW F82 M4 (Coupe)

• 2015–2020 BMW F83 M4 (Convertible)

Why Choose the PSM Diffuser 4-Piece Set Carbon Fiber?

• Complete visual transformation for the entire rear section

• Premium carbon construction with a consistent 2x2 weave

• Aggressive track-inspired styling

• Direct-fit installation

• In stock, ready to ship, and packaged with extreme care