Does the J's Racing Rear Diffuser fit the stock bumper by itself?

No. The J's Racing Rear Diffuser mounts to the Type-S rear under spoiler, not to the stock bumper or OEM under spoiler. Order a diffuser-only option if you already run the under spoiler, or a complete assembly to get both.

What is the difference between the four options?

Material and scope. Carbon or FRP construction of the same vacuum-infused diffuser mold, each available alone or bundled with the FRP Type-S under spoiler as a complete assembly, which saves money over buying the two parts separately.

Will it clear my aftermarket exhaust?

The system is molded around J's Racing's own FK8 exhausts. Other aftermarket systems may require cutting the diffuser to clear, and triple-tip exhaust layouts are not compatible.

Does it come painted?

No. The carbon version ships as bare carbon without clear coat, ready for optional UV clear or matte finishing, and the FRP version must be primed and painted. J's Racing instructs test-fitting and painting before installation.

Can I still use the factory jack points?

Yes, with one step: a marked section of the diffuser is cut away to keep the factory jack-up points accessible, a provision J's Racing built into the design.

Description

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BP PRICING DIFFERENCE

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Description

J’s Racing Rear Diffuser for FK8 Honda Civic Type R

The J’s Racing Rear Diffuser finishes the FK8 Honda Civic Type R’s rear aero the way J’s Racing designed the system to work. Made by vacuum infusion molding for fewer resin irregularities and air bubbles than conventional layup, the diffuser mounts to J’s Racing’s Type-S rear under spoiler and adds rectification and downforce at the rear, with the design priority placed squarely on the downforce effect. Choose carbon or FRP, alone if you already run the under spoiler, or as a complete assembly with it.

Design and Performance

The under spoiler’s upswept shape and widened center duct vent air trapped around the muffler to cut the parachute effect, and the diffuser’s strakes then straighten and accelerate the flow leaving the car. The two parts were molded around J’s Racing’s own FK8 exhausts, and the complete assemblies bundle the diffuser and under spoiler at a saving over buying separately.

Features

Carbon or FRP construction, diffuser alone or complete assembly with the under spoiler
Design priority on the downforce effect
Mounts to the J’s Racing Type-S rear under spoiler
Supplied unpainted (carbon ships bare; FRP requires prime and paint)
Vacuum infusion molding for fewer resin irregularities and air bubbles

Applications

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

Notes

The diffuser requires the J’s Racing Type-S rear under spoiler; the diffuser-only options are for cars that already have it
Drilling is required to fix bolts and nuts during installation
Cutting may be required with non-J’s Racing exhausts; not compatible with triple-tip exhaust systems
If using the factory jack-up points, the marked section of the diffuser must be cut
Test-fit and paint before installation
Not sure which configuration your car needs? contact us

Frequently Asked Questions

Does the J’s Racing Rear Diffuser fit the stock bumper by itself? No. The J’s Racing Rear Diffuser mounts to the Type-S rear under spoiler, not to the stock bumper or OEM under spoiler. Order a diffuser-only option if you already run the under spoiler, or a complete assembly to get both.
What is the difference between the four options? Material and scope. Carbon or FRP construction of the same vacuum-infused diffuser mold, each available alone or bundled with the FRP Type-S under spoiler as a complete assembly, which saves money over buying the two parts separately.
Will it clear my aftermarket exhaust? The system is molded around J’s Racing’s own FK8 exhausts. Other aftermarket systems may require cutting the diffuser to clear, and triple-tip exhaust layouts are not compatible.
Does it come painted? No. The carbon version ships as bare carbon without clear coat, ready for optional UV clear or matte finishing, and the FRP version must be primed and painted. J’s Racing instructs test-fitting and painting before installation.
Can I still use the factory jack points? Yes, with one step: a marked section of the diffuser is cut away to keep the factory jack-up points accessible, a provision J’s Racing built into the design.

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.

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