Designed for the 2015–2021 Subaru WRX / STI (Sedan)

🔧 Direct Fitment
Engineered for precise alignment with factory bumper points—no cutting or modification required.

🛠️ Material
Constructed from aerospace-grade lightweight aluminum to ensure strength, performance, and longevity.

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

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
Comes complete with all required hardware.
Professional installation is highly recommended.

💨 Why Add a Rear Diffuser to Your WRX/STI?
The V4 Rear Diffuser offers a bold, functional enhancement to your WRX or STI’s rear-end appearance. Its aggressive design helps manage airflow beneath the car to reduce drag and increase rear-end stability—giving your Subaru both show and go.

Confirmed Exhaust Fitments:

• - Invidia R400
• - Nameless Exhaust Systems
• - Muffler Delete Setups
• - Subiespeed Exhaust
• - Militek Quadtip

Please email or call us if you have any questions regarding exhaust fitment.