2015-2021 Subaru Wrx/Sti Rear Diffuser V4
SHIPPING - RETURNS - WARRANTY - CANCELLATION POLICY
*** Market Conditions after 2020 have changed the landscape of automotive parts. Although we try to stock 1000's of items in our multiple warehouse and use multiple distribution channels, having back-orders are unavoidable in today's market. If you are in need of a product quickly, we suggest email, message, or call us for availability so that we may explore your options.
Email: Sales@Speedzoneweb.com
Call: 407-846-8430
Text: 407-749-6314
Frequently Asked Questions
🚨 Lead Time: 2 Weeks
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.
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.
Our History
For 23 years Speedzone Performance LLC has been providing aftermarket car parts to Central Floridians and 1000's of customers online. What makes us different than all the other places online? We have 3 actual brick and mortar locations where were serve customers daily and find new ways to provide support and assistance to the automotive community at large. From our in house SPDZ1 Brand, to our constantly growing in stock inventory, we strive to make our customer service and ease of purchase stand out from the rest! We are also one of the largest automotive part financing providers anywhere in the United States, and continue to provide more options for our customers every year. We love what we do, and it shows in every product we sell and every new customer who becomes a part of our Speedzone Family.