What does a 15mm ducktail wing actually do at speed on the R35?

A ducktail generates downforce by disrupting the airflow separating off the rear of the car and redirecting it downward. At 15mm the effect is subtle compared to a full bolt-on wing but meaningful in terms of rear stability at highway and circuit speeds. The advantage over a larger wing is that the ducktail produces downforce with less drag, so straight-line speed is not penalized to the same degree. The reinforced underframe ensures the lid handles those aerodynamic loads without flexing.

Is the ducktail wing removable or is it part of the lid structure?

The ducktail is integrated into the trunk lid and is not removable. It is part of the carbon layup and underframe structure rather than a bolt-on addition. Owners wanting a clean trunk lid without a wing should consider a standard carbon trunk option; this lid is specifically designed around the ducktail as a functional aerodynamic feature.

Does the carbon finish require any additional treatment before fitting?

The lid is supplied unpainted. Clear coating before installation is recommended to protect the carbon weave from UV degradation over time.

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Description

Top Secret Carbon Lightweight Trunk for R35 Nissan GT-R

The Top Secret carbon lightweight trunk GT-R owners looking to reduce rear weight while adding a functional aerodynamic element replaces the factory steel lid with a full carbon unit that retains the stock trunk profile but integrates a 15mm ducktail mini-wing along the top trailing edge. The ducktail shape is not cosmetic; it generates downforce at the rear of the car in the same way a full wing does but without the visual bulk or the drag penalty that comes with a larger wing. The underframe is reinforced to handle the downforce loads the wing produces at speed, so the lid is not simply a lightened panel with a lip added but a structural component built to function correctly under aerodynamic stress. Full carbon construction keeps weight low and rigidity high, and the overall shape matches the factory trunk profile so the car retains its stock silhouette from most angles. Fits the R35 GT-R across all chassis variants.

Features

Full carbon construction
Integrated 15mm ducktail
Retains factory trunk profile and silhouette
Reinforced underframe to handle downforce loads at speed
Direct replacement for the factory trunk lid

Applications

Nissan GT-R: CBA-R35, DBA-R35, EBA-R35, 4BA-R35 | 2008-2025

Notes

All Top Secret carbon is delivered in its raw state and will require prep and application of a UV resistant clear coat and/or PPF

Frequently Asked Questions

What does a 15mm ducktail wing actually do at speed on the R35? A ducktail generates downforce by disrupting the airflow separating off the rear of the car and redirecting it downward. At 15mm the effect is subtle compared to a full bolt-on wing but meaningful in terms of rear stability at highway and circuit speeds. The advantage over a larger wing is that the ducktail produces downforce with less drag, so straight-line speed is not penalized to the same degree. The reinforced underframe ensures the lid handles those aerodynamic loads without flexing.
Is the ducktail wing removable or is it part of the lid structure? The ducktail is integrated into the trunk lid and is not removable. It is part of the carbon layup and underframe structure rather than a bolt-on addition. Owners wanting a clean trunk lid without a wing should consider a standard carbon trunk option; this lid is specifically designed around the ducktail as a functional aerodynamic feature.
Does the carbon finish require any additional treatment before fitting? The lid is supplied unpainted. Clear coating before installation is recommended to protect the carbon weave from UV degradation over time.

About Top Secret

Top Secret Co., Ltd. (株式会社トップシークレット, Kabushiki-gaisha Toppu Shīkuretto) is a renowned Japanese automobile tuner and parts manufacturer, founded by automotive engineer and driver Kazuhiko “Smokey” Nagata. The company is widely recognized for its expertise in tuning, aftermarket parts, body kits, and performance engineering. Top Secret’s product range includes aero components, exterior and interior parts, engine upgrades, exhaust systems, chassis, brakes, suspension, and powertrain enhancements. In addition to its products, Top Secret is also famous for its high-speed Wangan runs, as well as its involvement in professional drifting, circuit racing, and drag racing.

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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