What does the Type-S Rear Under Spoiler actually do?

The Type-S Rear Under Spoiler replaces the closed factory piece with an upswept shape and a widened center duct that vents the air trapped around the muffler. Cutting that trapped-air parachute effect reduces rear-end drag while straightening the airflow leaving the car.

Is it required for the J's Racing rear diffuser?

Yes. The rear diffuser mounts to this under spoiler and cannot attach to the stock bumper or OEM under spoiler, so this piece is the foundation of J's Racing's FK8 rear aero system.

Does it come ready to install?

It bolts on in place of the genuine under spoiler, but the FRP arrives in black gel coat, unpainted. J's Racing instructs test-fitting and painting before installation.

Will it clear my exhaust?

The shape is molded around J's Racing's own FK8 mufflers. Most other systems fit with at most minor trimming, but cutting may be required for some aftermarket exhausts.

Does it fit all FK8 model years?

Yes, the under spoiler fits the 2017 to 2021 Honda Civic Type R FK8.

Description

Additional Info

Shipping policy

BP PRICING DIFFERENCE

Reviews

Product Inquiry

Description

J’s Racing Type-S Rear Under Spoiler for FK8 Honda Civic Type R [AR-K8-F]

The J’s Racing Type-S Rear Under Spoiler attacks a drag source most FK8 Honda Civic Type R owners never think about: the pocket of air trapped around the muffler. Its aggressive upswept shape straightens rear airflow while a center duct widened as much as possible vents that trapped air, minimizing the parachute effect. The piece bolts on in place of the genuine under spoiler and doubles as the mounting base for J’s Racing’s rear diffuser.

Features

Bolt-on replacement for the genuine rear under spoiler
Center rear duct widened as much as possible to vent trapped air
FRP construction with black gel coat, supplied unpainted
Serves as the required mounting base for the J’s Racing rear diffuser (sold separately)
Upswept shape improves rectification of rear airflow

Applications

Honda Civic Type R: FK8 | 2017-2021 | 2.0L K20C1 Turbo

Notes

Test-fit and paint before installation
Molded around J’s Racing’s FK8 exhausts; cutting may be required to clear other aftermarket systems
To add the rear diffuser now or later, contact us

Frequently Asked Questions

What does the Type-S Rear Under Spoiler actually do? The Type-S Rear Under Spoiler replaces the closed factory piece with an upswept shape and a widened center duct that vents the air trapped around the muffler. Cutting that trapped-air parachute effect reduces rear-end drag while straightening the airflow leaving the car.
Is it required for the J’s Racing rear diffuser? Yes. The rear diffuser mounts to this under spoiler and cannot attach to the stock bumper or OEM under spoiler, so this piece is the foundation of J’s Racing’s FK8 rear aero system.
Does it come ready to install? It bolts on in place of the genuine under spoiler, but the FRP arrives in black gel coat, unpainted. J’s Racing instructs test-fitting and painting before installation.
Will it clear my exhaust? The shape is molded around J’s Racing’s own FK8 mufflers. Most other systems fit with at most minor trimming, but cutting may be required for some aftermarket exhausts.
Does it fit all FK8 model years? Yes, the under spoiler fits the 2017 to 2021 Honda Civic Type R FK8.

About J’s Racing

J’s Racing is one of Japan’s most respected Honda tuning houses, developing parts the hard way: on real race tracks in Super Taikyu endurance competition and time attack rather than on paper. From aero and titanium exhausts to suspension and driveline components, every product carries lessons learned from decades of racing Hondas at the limit. Bulletproof Automotive imports J’s Racing parts directly from Japan, bringing authentic, race-proven JDM engineering to enthusiasts in the US and worldwide.

Additional Information

The Bulletproof Automotive website contains many thousands of products purchased in multiple different currencies. All of the prices are entered manually and accurately at the time of entry. Due to the consistently fluctuating international exchange rates, at times prices may not be able to be honored at their original intended rate. We apologize for any inconvenience this may cause, unfortunately our website is unable to compensate dynamically for what can at times be volatile changes in the cost of items due to currency values fluctuating, changes in prices from suppliers, changes in shipping and import duties, and other factors. Rest assured that any order you place on line will be at zero risk to you in this area. If in the event your order cannot be fulfilled at the original intended website price we will offer you a 100% refund, no questions asked. We will continue to do our best to maintain updated prices and we will always continue to offer our price match guarantees as well to ensure our prices are always the best for you. In short, prices may change without notice. It is always advised to give us a call prior to placing your order online to confirm availability and to confirm current pricing.

Shipping Policy

Items that are in stock in the US, either at Bulletproof’s warehouse or at a supplier’s warehouse, are generally delivered within 7-10 days. Special order items from overseas take considerably longer. As a courtesy Bulletproof offers delivery estimates to our customers which take into consideration manufacturer availability and shipping schedule. These estimates represent our best guess based on previous orders from the manufacturer and do not in any way imply a guaranteed delivery window. Many manufacturers work in a “just in time” inventory system and often take 2-20+ weeks to produce an item once an order is submitted. All deliverable items are then sent to our Japanese warehouse. Bulletproof ships a minimum of one full ocean freight container every month from Japan, oftentimes more than one a month. Ocean freight takes an average of 4 weeks. Typically it breaks down to one week in Japan for paperwork and customs, two weeks by boat and one week in US customs/clearance. Due to the wide number of variables between manufacturer and shipping schedules, delivery estimates are simply just that – estimates. We attempt to estimate conservatively and we usually deliver faster than our estimates suggest. It is not Bulletproof’s policy to guarantee delivery time of any special order item, this is impossible for us to do. By ordering you acknowledge that there is no required delivery ETA and an order may not be canceled or altered due to manufacturing or shipping delays, all ETA’s are provided as a best guess only. Please review the full Terms & Conditions here.

BP Pricing Difference

We do pricing a little differently on our JDM brands and we believe in making things simple and clear. No hidden fees or surcharges. Every price you see includes the shipping cost to our office in Los Angeles, California and all the associated taxes/duties/fees for bringing the products into the US. The only shipping you ever pay is from our facility in the US to your location. Be wary of resellers that don’t include the cost of international shipping in their pricing on JDM parts. While we believe we’ll always have the lowest all-in price on JDM products, we offer a price match guarantee for all authentic parts purchased from authorized dealers as well. For many international customers, it’s much more affordable to ship from the USA than from Japan directly, as the air freight and ocean freight costs are typically much less. However, for customers looking to ship directly from Japan outside of North America, or domestically in Japan, we can provide pricing specifically for that scenario. Please do not hesitate to contact us with any pricing questions or concerns. Please email us at sales@bulletproofautomotive.com with any inquiries.

Reviews

There are no reviews yet.

Only logged in customers who have purchased this product may leave a review.

Product Inquiry

First Name (*required)

Last Name (*required)

Your E-Mail (*required)

Telephone Number (*required)

Country (*required)

Vehicle Year / Make / Model (*required)

Please Explain What do you want to do with your vehicle

Additional Information (optional)

I agree to the terms & conditions and privacy policy and to have Bulletproof Automotive LLC contact me for promotion, marketing and other purposes via email, phone or SMS message.