Does the diffuser need paint before fitting?

Yes. It is supplied in unpainted black gelcoat, and the manufacturer states that painting is required before it is installed. Fitting work on the car is also needed, so have the body shop test fit the diffuser first, then paint it to match or contrast with the bumper.

Will the factory reflectors stay on the car?

Yes. The design allows the factory rear reflectors to be transferred into the diffuser, so they remain on the car after installation. Remove them carefully from the stock location and keep the original hardware together during the swap so nothing goes missing.

Does the Type-S Rear Diffuser for ZF1 cars add drag?

No. The manufacturer describes the Type-S Rear Diffuser for ZF1 cars as an aero part that does not create drag such as a parachute effect, so it adds downforce without hurting fuel economy. It works by speeding up the air flowing under the body. Drag and downforce figures are not published.

What does it change in the way the car drives?

The manufacturer says the downforce from the diffuser improves stability at high speed and can raise cornering speed. The effect is greatest at higher speeds, since aerodynamic downforce grows as speed rises, so expect the difference on fast roads and circuits rather than in town.

How does it change the look of the car?

The diffuser follows the shape of the rear fenders and covers nearly half of the rear bumper, which emphasizes the width of the CR-Z from behind. The styling borrows from GT race cars. Painted to match or in a contrasting color, it gives the rear a more purposeful look.

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BP PRICING DIFFERENCE

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Description

J’s Racing Type-S Rear Diffuser for ZF1 Honda CR-Z

J’s Racing’s Type-S Rear Diffuser for ZF1 CR-Z builds takes its cue from GT racing, using the volume of the rear fenders and covering close to half of the rear bumper to make the car look wider. Underneath, its surfaces straighten the airflow and speed up the air moving under the body, which is how J’s Racing generates downforce here. The Osaka tuner says this adds stability at high speed and can raise cornering speed, and because it creates no parachute-style drag, it does so without hurting fuel economy. It fits a CR-Z that sees fast roads or circuits; on a show car the gain is purely visual.

Design and Performance

The factory rear reflectors transfer into the diffuser, so the car keeps them after installation. It is supplied unpainted in black gelcoat and must be painted before it goes on, and fitting work on the car is required. The painted diffuser in J’s Racing’s photos shows the finished result rather than the condition it ships in.

Features

GT-inspired shape that uses the volume of the rear fenders
Covers nearly half of the rear bumper for a wider look
Underside shaped to straighten airflow for a diffuser effect
Raises air speed under the car to create downforce
No parachute-effect drag, so fuel economy is not compromised, per J’s Racing
Accepts the factory reflectors

Applications

Honda CR-Z: ZF1 | 2010-2016 | 1.5L LEA hybrid

Notes

Supplied unpainted in black gelcoat; paint is required before installation and is not included
Fitting work on the car is needed during installation
Also part of the four-piece J’s Racing Type-S Aero Kit for the ZF1 CR-Z
Made to order in Japan; Bulletproof Automotive confirms the lead time with J’s Racing USA after you check out

Frequently Asked Questions

Does the diffuser need paint before fitting? Yes. It is supplied in unpainted black gelcoat, and the manufacturer states that painting is required before it is installed. Fitting work on the car is also needed, so have the body shop test fit the diffuser first, then paint it to match or contrast with the bumper.
Will the factory reflectors stay on the car? Yes. The design allows the factory rear reflectors to be transferred into the diffuser, so they remain on the car after installation. Remove them carefully from the stock location and keep the original hardware together during the swap so nothing goes missing.
Does the Type-S Rear Diffuser for ZF1 cars add drag? No. The manufacturer describes the Type-S Rear Diffuser for ZF1 cars as an aero part that does not create drag such as a parachute effect, so it adds downforce without hurting fuel economy. It works by speeding up the air flowing under the body. Drag and downforce figures are not published.
What does it change in the way the car drives? The manufacturer says the downforce from the diffuser improves stability at high speed and can raise cornering speed. The effect is greatest at higher speeds, since aerodynamic downforce grows as speed rises, so expect the difference on fast roads and circuits rather than in town.
How does it change the look of the car? The diffuser follows the shape of the rear fenders and covers nearly half of the rear bumper, which emphasizes the width of the CR-Z from behind. The styling borrows from GT race cars. Painted to match or in a contrasting color, it gives the rear a more purposeful look.

About J’s Racing

J’s Racing was established in Osaka in 1989, as VTEC engines and lightweight Civics and Integras were changing what a Honda could do, and it has built parts for Hondas ever since. The company develops engine response, suspension, braking, cooling and aerodynamics together as one system, then proves the parts in time attack, gymkhana, endurance and circuit racing. Its Fit lapped Tsukuba Circuit in 1’00.459, and its naturally aspirated AP1 S2000, the Maou car, became the company’s reference build for the Honda roadster. Every J’s Racing part is designed and tested in Japan, and J’s Racing USA in Carson, California handles distribution in the United States.

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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J’s Racing Type-S Rear Diffuser for ZF1 Honda CR-Z [RDF-Z1-F]

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J’s Racing Type-S Rear Diffuser for ZF1 Honda CR-Z

Design and Performance

Features

Applications

Notes

Frequently Asked Questions

About J’s Racing

Reviews