What is the purpose of a rear diffuser?

A rear diffuser efficiently creates an increase downforce through a vacuum created by low pressure under the vehicle and high pressure behind the vehicle.

BMW E92-E93 Rear Diffuser

Kia Cerato GT Hatch Flow-Lock Rear Diffuser

Model 3 Carbon Fiber Spoiler/ Blade ($229 w/ 20% OFF)

Universal Rear Diffusers - Carbon Fibre

CORSAIR Rear Diffuser – ARCHETYPE RACING

What Is The Function of A Car Rear Diffuser? - Winn Autosports

516-02801-WC LAPTORR REAR DIFFUSER Wet Carbon for E46-M3

Carbon fiber rear diffuser

Aluminum Rear Diffuser - 3 Pcs (Universal) – Artwork Bodyshop Inc.

Racing Time Attack Rear Diffuser T8 - G.R.A.M.S Styling

F30 Carbon Fiber Signature Rear Diffuser AACC Signature Series

Universal Rear Diffuser – TX Autosport