2015-2021 Subaru WRX/STI V4 Diffuser
2015-2021 Subaru WRX/STI V4 Diffuser
AFD-VA-AL-DIFF-V4-GBK
$ 499.99
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Choose one option in each of the 1 sections below.
Finish
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Check if this fits your vehicle
Free shipping to the lower 48 states! — Excludes Custom Exhausts
As low as $ 124.99/mo with affirm
Limited Lifetime Warranty
Fitment Guarantee
Description
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.
Fitment & Specs
Use the vehicle finder to verify compatibility for your specific make, model and year.
Shipping
Free shipping (no minimum).
01 / Configurator
Find Parts For Your Vehicle
Three steps. Zero guesswork. Every part bench-tested against the OEM body for a 100% fitment guarantee.
If you have questions or concerns, feel free to contact our specialist today!
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OWNER FEEDBACK
Real Builds. Real Results.
Verified feedback from enthusiasts who installed, drove, and lived with this product.
