2017-2021 Honda Civic Type-R V5 Diffuser

CURRENTLY OUT OF PRODUCTION

Designed for the 2017–2021 Honda Civic Type R (FK8)

🔧 Direct Fitment
Engineered to bolt directly onto the OEM rear bumper of the FK8 Type R without the need for modifications.

🛠️ Material
Crafted from aerospace-grade lightweight aluminum, offering both strength and weight savings for performance applications.

⚙️ Finish & Build Quality
Fully CNC’d and professionally powder coated in gloss black for a sleek and durable finish. Pre-drilled for easy alignment and mounting.

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
Ships with all required hardware for installation.
Professional installation is highly recommended.

💨 Why Add a Rear Diffuser to Your FK8?
The V5 diffuser delivers aggressive styling while boosting underbody airflow control. It enhances high-speed stability by reducing rear-end turbulence, all while giving your Civic Type R a bolder, track-inspired appearance.

Confirmed Exhaust Fitment:

- AFE Takada 

- HKS

- Muffler Deletes

- REMUS 

- ARMYTRIX

Please contact us for exhaust fitments.

A rear diffuser is an automotive aerodynamic modification typically found mounted on the vehicle’s underbody located at the rear of the vehicle, underneath the rear bumper. As a vehicle is in motion, air flowing in the underbody is typically at high-speed and has low-pressure. The design and purpose of a diffuser are to help reduce drag and to create downforce by facilitating the airflow underneath the vehicle’s underbody. A diffuser is used to increase the air volume along its full length, thus creating a void that must be filled by air. This in turn creates a Venturi effect, meaning the air flow is accelerated at the beginning of the diffuser creating a low pressure, thus creating downforce. As the air travels along the full length of the diffuser, the high velocity air is eased back into normal velocity matching the ambient velocity at the rear of the vehicle reducing overall drag. With the addition of vertical “fins” attached to the diffuser, this helps to optimize the diffusers efficiency by ensuring that all air being drawn into the diffuser is from the underbody and isn’t being drawn from the upper body surfaces. A diffuser is best optimized with the addition of a front splitter to help mediate the underbody’s airflow.