BMW G20/G21 M340i Carbon Fibre AO Style Rear Diffuser

BMW G20/G21 M340i Carbon Fibre AO Style Rear Diffuser

Complete the aggressive styling of your BMW G20/G21 M340i with the AO Style Carbon Fibre Rear Diffuser. Designed specifically for the BMW G20 Sedan and G21 Touring M340i, this premium rear diffuser transforms the rear of the vehicle with bold motorsport-inspired styling while enhancing its aerodynamic profile.

Manufactured from premium carbon fibre, the AO Style Rear Diffuser combines lightweight construction with exceptional strength and durability. Featuring an aggressive multi-piece design with sculpted aerodynamic fins and integrated side extensions, it creates a lower, wider, and more purposeful rear-end while maintaining a premium OEM+ fit and finish.

Whether you're building a subtle street car or a fully customised performance vehicle, the AO Style Carbon Fibre Rear Diffuser is the perfect finishing touch.

Key Features

Premium Carbon Fibre Construction

Manufactured from high-quality carbon fibre for exceptional strength, lightweight performance, and long-lasting durability.

High-Gloss UV Resistant Finish

Finished with a premium UV-resistant clear coat to help protect against fading, yellowing, and environmental exposure.

Aggressive AO Style Design

Features a bold AO Style profile with sculpted aerodynamic fins and integrated side extensions that deliver an unmistakable motorsport-inspired appearance.

Improved Aerodynamics

Designed to help optimise airflow beneath the rear of the vehicle while complementing the factory aerodynamic characteristics.

Precision Fitment

Engineered specifically for the BMW G20 Sedan and G21 Touring M340i, ensuring excellent fitment and seamless integration with the factory rear bumper.

Lightweight Construction

Carbon fibre construction provides exceptional rigidity while keeping additional weight to an absolute minimum.

Performance Benefits

Enhanced Rear-End Styling

Transforms the rear of your M340i with a lower, wider, and more aggressive appearance.

Improved Aerodynamic Profile

The integrated diffuser fins help optimise airflow beneath the vehicle while complementing other aerodynamic upgrades.

Completes Your Carbon Fibre Build

Pairs perfectly with carbon fibre front lips, side skirts, mirror caps, rear spoilers, and rear spats to create a cohesive performance-inspired exterior package.

Premium OEM+ Finish

Designed to integrate seamlessly with the factory rear bumper while maintaining a refined, factory-quality appearance.

Vehicle Fitment

BMW G20 M340i Sedan (2019+)

BMW G21 M340i Touring (2019+)

Please Note

Professional installation is strongly recommended.

Designed specifically for BMW G20 Sedan and G21 Touring M340i models.

Minor preparation, alignment, or adjustment may be required during installation to achieve optimal fitment.

Due to the nature of carbon fibre manufacturing, slight variations in weave pattern may occur between products.

Why Choose Proven Performance Parts

We specialise in high-performance parts for European vehicles — including Volkswagen GTI & R models, Audi S/RS platforms, and BMW M vehicles. Every product we offer is carefully selected for its quality, fitment, and real-world performance — tested by enthusiasts, for enthusiasts.