Designed for the 2022–2026 Subaru WRX

🔧 Direct Fitment
Engineered for precise compatibility with the OEM rear bumper of the 2022–2026 WRX. No modifications required.

🛠️ Material
Crafted from aerospace-grade lightweight aluminum to ensure maximum strength and durability without adding unnecessary weight.

⚙️ Finish & Build Quality
Professionally CNC machined and powder coated in gloss black. Pre-drilled for a seamless installation experience.

Made in the USA
Proudly designed and manufactured in the United States with premium craftsmanship.

Production Lead Time
CNC items are made to order and have raw materials allocated to production once the order is placed. For concerns regarding current lead times, please review the CNC Products section in our Terms & Conditions.

🧰 Install-Friendly
All necessary hardware is included. Ships as a complete unit for a straightforward install.
Professional installation is highly recommended.

🎨 Optional Edge Accent Liners
Personalize your diffuser with optional liner accents available in red, white, black, or gold. These edge liners provide a clean finish and aggressive detail to match your WRX build.

💨 Why Add a Rear Diffuser to Your WRX?
A diffuser improves the aerodynamic flow beneath your vehicle, minimizing drag and generating downforce at speed. Paired with its sharp, aggressive styling, it not only enhances performance but also delivers a track-ready appearance that demands attention.

Ready to go full aero? Pair it with our front lip and side skirts to build the ultimate WRX street or track setup.

A rear diffuser is an automotive aerodynamic modification typically found mounted on the vehicle’s underbody located at the rear of the car, underneath the rear bumper. As a vehicle is in motion, air flowing in the underbody is typically at high-speed and has low-pressure. The design and purpose of a diffuser are to help reduce drag and to create downforce by facilitating the airflow underneath the vehicle’s underbody. A diffuser is used to increase the air volume along its full length, thus creating a void that must be filled by air. This in turn creates a Venturi effect, meaning the air flow is accelerated at the beginning of the diffuser creating a low pressure, thus creating downforce. As the air travels along the full length of the diffuser, the high-velocity air is eased back into standard velocity matching the ambient speed at the rear of the vehicle reducing overall drag. With the addition of vertical “fins” attached to the diffuser, this helps to optimize the diffusers efficiency by ensuring that all air drawn into the diffuser is from the underbody and not from the upper body surfaces. A diffuser can be further tune-up with the addition of a front splitter to help mediate the underbody’s airflow.