2015 - 2021 Subaru Wrx/Sti Rear Diffuser V1
Designed for the 2015–2021 Subaru WRX / STI
🔧 Direct Fitment
Specifically designed for a clean, bolt-on fit to the OEM rear bumper of all 2015–2021 WRX and STI models—no modifications needed.
🛠️ Material
Crafted from aerospace-grade lightweight aluminum, offering unmatched strength and durability for street or track use.
⚙️ Finish & Build Quality
Fully CNC’d and professionally powder coated in gloss black. Pre-drilled mounting points ensure an efficient and accurate installation.
Made in the USA
Expertly manufactured in the United States with precision and pride.
🧰 Install-Friendly
Includes all necessary hardware for a complete install.
Professional installation is highly recommended.
💨 Why Add a Rear Diffuser to Your WRX/STI?
This diffuser enhances your vehicle’s aerodynamics by managing underbody airflow and reducing drag. The aggressive design also gives your WRX/STI a bold, race-ready look that turns heads wherever you go.
Processing & Shipping Overview
Processing occurs before shipping.
Most in-stock items typically process within 2–3 business days before shipment or pickup. Expedited shipping options affect transit time after an order ships and do not speed up processing.
Made-to-order, special-order, vendor drop-ship, and freight items require additional processing time before shipping. Any extended lead times will be noted on the product page when applicable.
For the most up-to-date order status or lead time questions, please contact sales@smgspeed.com or use live chat during business hours.