Why would an R35 GT-R owner replace the rear tension arms?

The factory rear tension arms on the R35 GT-R are fixed, meaning caster cannot be changed without swapping the arm entirely. The Top Secret rear tension arms R35 GT-R replace that fixed geometry with a fully adjustable pillow ball arm, which matters most when the car has been lowered, is running modified suspension, or is being set up for track use where caster tuning affects stability and turn-in response.

What does caster adjustment actually change on the R35?

Caster affects straight-line stability, steering returnability, and how the car loads the outside front tyre through a corner. On an R35 GT-R, increasing caster generally improves high-speed stability and adds camber gain through steering input, which is useful on track. The ability to adjust it freely means the setup can be changed to suit the driver and the circuit rather than staying locked at the factory value.

How does the turnbuckle system make adjustment easier?

On most adjustable arms, getting to the adjustment point requires removing underbody panels first. The Top Secret rear tension arms use a turnbuckle that is accessible without pulling the undercover, so caster changes can be made quickly at the track between sessions without dismantling anything underneath the car.

What is the difference between pillow ball ends and the factory rubber bushings?

Factory rubber bushings flex under load, which introduces a small but measurable amount of compliance into the rear suspension geometry. Pillow ball ends are rigid, so the geometry you set is the geometry the car runs. On a GT-R being driven hard, that directness translates to more consistent rear end behavior and better feedback through the suspension.

Are these arms suitable for a street-driven R35 or only for track builds?

Both. The adjustability means the arms can be set to a street-friendly caster value for daily use and readjusted for track work without removal. The pillow ball ends are stiffer than rubber, which some owners notice on rough road surfaces, but the tradeoff is acceptable for most builds that see mixed use.

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Description

Top Secret Rear Tension Arms for R35 Nissan GT-R

The Top Secret rear tension arms R35 GT-R builds running anything beyond stock alignment need are a direct answer to the caster limitations of the factory setup. The OEM arms offer no adjustment, which means any caster change requires either compromise or arm replacement. These swap that fixed geometry for a fully adjustable pillow ball arm built from STKM13 carbon steel, letting you dial caster freely across a range that covers daily street use through dedicated circuit work. The turnbuckle adjustment system is the practical detail that separates this from most adjustable arms on the market: changes are made without pulling the underbody cover, so alignment adjustments at the track do not become a half-hour job. Pillow ball ends replace the factory rubber, giving a more direct and consistent feel through the rear suspension without the deflection that compounds under load on a hard-driven R35.

Features

Fully adjustable caster via turnbuckle system
Turnbuckle adjustment accessible without removing the undercover
Pillow ball ends for direct feel and reduced deflection versus OEM rubber
STKM13 carbon steel construction
Suitable for street alignment through full track setup
Sold as a pair

Specifications

Material: STKM13 carbon steel
Adjustment: Rear caster
Adjustment Method: Turnbuckle
End Type: Pillow ball

Applications

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

Notes

Sold as a pair
Caster adjustment range will depend on ride height and suspension configuration
Set alignment on a flat surface after any adjustment
Confirm torque specs before finalizing installation

Frequently Asked Questions

Why would an R35 GT-R owner replace the rear tension arms? The factory rear tension arms on the R35 GT-R are fixed, meaning caster cannot be changed without swapping the arm entirely. The Top Secret rear tension arms R35 GT-R replace that fixed geometry with a fully adjustable pillow ball arm, which matters most when the car has been lowered, is running modified suspension, or is being set up for track use where caster tuning affects stability and turn-in response.
What does caster adjustment actually change on the R35? Caster affects straight-line stability, steering returnability, and how the car loads the outside front tyre through a corner. On an R35 GT-R, increasing caster generally improves high-speed stability and adds camber gain through steering input, which is useful on track. The ability to adjust it freely means the setup can be changed to suit the driver and the circuit rather than staying locked at the factory value.
How does the turnbuckle system make adjustment easier? On most adjustable arms, getting to the adjustment point requires removing underbody panels first. The Top Secret rear tension arms use a turnbuckle that is accessible without pulling the undercover, so caster changes can be made quickly at the track between sessions without dismantling anything underneath the car.
What is the difference between pillow ball ends and the factory rubber bushings? Factory rubber bushings flex under load, which introduces a small but measurable amount of compliance into the rear suspension geometry. Pillow ball ends are rigid, so the geometry you set is the geometry the car runs. On a GT-R being driven hard, that directness translates to more consistent rear end behavior and better feedback through the suspension.
Are these arms suitable for a street-driven R35 or only for track builds? Both. The adjustability means the arms can be set to a street-friendly caster value for daily use and readjusted for track work without removal. The pillow ball ends are stiffer than rubber, which some owners notice on rough road surfaces, but the tradeoff is acceptable for most builds that see mixed use.

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.

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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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