2015-2021 Subaru WRX/STI V3 Diffuser
Designed for the 2015–2021 Subaru WRX / STI
🔧 Direct Fitment
Specifically engineered to mount directly to the factory rear bumper with no cutting or trimming required.
🛠️ Material
Crafted from aerospace-grade lightweight aluminum for superior durability and strength.
⚙️ Finish & Build Quality
Precision CNC-cut and professionally powder coated in gloss black. Pre-drilled for straightforward installation.
Made in USA
Proudly manufactured in the United States using high-grade materials and expert 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
Includes all required hardware.
Professional installation is highly recommended.
💨 Why Add a Rear Diffuser to Your WRX/STI?
This rear diffuser enhances the WRX/STI’s aggressive styling while improving aerodynamic performance. By optimizing underbody airflow, it helps reduce drag and increase rear-end stability at higher speeds.