Does this Rear Under Bumper work with the genuine rear bumper?

Yes, the Top Secret GT-R V2 Rear Under Bumper is compatible with the genuine rear bumper, so it doesn't require swapping to the M17 rear bumper to install.

How much longer is the V2 compared to the V1 Top Secret under bumper?

The Top Secret GT-R V2 Rear Under Bumper is 10mm longer than the V1 version, for 25mm of total added length over the stock rear under bumper it replaces.

What does the extra length on the V2 under bumper actually do?

The added length on the Top Secret GT-R V2 Rear Under Bumper is built to improve underbody cooling and reduce air resistance, giving the diffuser more surface area to manage airflow exiting the rear of the car.

Can DBA GT-R owners keep their factory rear fog lights with this bumper?

Yes, DBA R35 GT-R vehicles can keep the original rear fog lights installed as-is when running the Top Secret GT-R V2 Rear Under Bumper.

Description

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Description

Top Secret V2 Rear Under Bumper for CBA / DBA-R35 Nissan GT-R

The Top Secret GT-R V2 Rear Under Bumper is a newly designed rear diffuser bumper built to improve underbody cooling and cut air resistance on CBA and DBA R35 GT-R models. It’s compatible with the genuine rear bumper, so there’s no need to swap the whole rear fascia to run it. Version 2 runs 10mm longer than the original Top Secret V1 diffuser, for 25mm of total added length over the stock rear under bumper, giving the underbody more surface to manage airflow as it exits the back of the car. Installation stays simple: it’s a bolt-on design that only requires replacing the original rear bumper fascia, not a full rear-end teardown. DBA vehicles can keep their original rear fog lights installed as-is. Available in Carbon Fiber or FRP.

Features

Built to improve underbody cooling and reduce air resistance
Compatible with the genuine rear bumper, no M17 rear bumper swap required
10mm longer than the Top Secret V1 diffuser, 25mm longer than the stock rear under bumper
Bolt-on installation, only requires replacing the original rear bumper fascia
DBA vehicles retain use of the original rear fog lights as-is

Applications

Nissan GT-R: CBA-R35, DBA-R35 | 2008-2016

Notes

DBA vehicles can retain the original rear fog lights installed as-is
All FRP is delivered unpainted, and 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

Does this Rear Under Bumper work with the genuine rear bumper? Yes, the Top Secret GT-R V2 Rear Under Bumper is compatible with the genuine rear bumper, so it doesn’t require swapping to the M17 rear bumper to install.
How much longer is the V2 compared to the V1 Top Secret under bumper? The Top Secret GT-R V2 Rear Under Bumper is 10mm longer than the V1 version, for 25mm of total added length over the stock rear under bumper it replaces.
What does the extra length on the V2 under bumper actually do? The added length on the Top Secret GT-R V2 Rear Under Bumper is built to improve underbody cooling and reduce air resistance, giving the diffuser more surface area to manage airflow exiting the rear of the car.
How difficult is this under bumper to install? The Top Secret GT-R V2 Rear Under Bumper is a bolt-on design that only requires replacing the original rear bumper fascia, without a full rear-end teardown.
Can DBA GT-R owners keep their factory rear fog lights with this bumper? Yes, DBA R35 GT-R vehicles can keep the original rear fog lights installed as-is when running the Top Secret GT-R V2 Rear Under Bumper.

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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