2015-2021 Subaru WRX/STI V4 Diffuser

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 the USA
Expertly crafted in the United States using premium materials and industry-leading standards.

🧰 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.

CNC-cut aero components are produced per order and require material allocation and machine programming.

• Typical Lead Time: 3-5 weeks
  

• CNC items may be canceled within 48 hours
  

• After 48 hours: Orders become FINAL SALE

• Any cancellation request will be subject to a restocking fee due to production preparation already in progress.

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.