2017-2021 Honda Civic Type-R Rear Diffuser V5
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 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 the USA
Proudly built in the United States with expert craftsmanship and attention to detail.
🧰 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.
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.