What is in the Valvetrain Package for R35?

The T1 Valvetrain Package for R35 is a full Ferrea valvetrain for stock VR38 cylinder heads: valves, high pressure valve springs, titanium retainers and all of the other components needed for the upgrade. Camshafts are not included and are chosen separately for the build.

Why upgrade the valvetrain?

Raising boost and rpm puts more demand on the valve springs to keep the valves following the camshaft. Stiffer Ferrea springs, titanium retainers and Ferrea valves give the heads that control, which is why T1 Race Development builds its engines with a Ferrea valvetrain.

Does it include camshafts?

No. The package covers the valvetrain only. T1 Race Development offers its GT1R camshafts and recommends them for most builds from 800 to 2,500 hp, and Bulletproof Automotive can help choose a camshaft to suit the rest of the engine.

Can T1 supply finished heads instead?

Yes. T1 Race Development sells its GT1R Race Heads, which are rebuilt, CNC ported and fitted with a full Ferrea valvetrain including 1 mm oversize Competition Plus valves, dual springs and titanium retainers, in Race Stage 1 and Race Stage 2 form.

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Description

T1 Race Development GT1R Valvetrain Package for R35 Nissan GT-R

T1 Race Development’s GT1R Valvetrain Package for R35 Nissan GT-R is the T1-spec Ferrea valvetrain for upgrading stock VR38 cylinder heads, with valves, springs, titanium retainers and every other component the job needs. It comes in two versions: 1 mm oversize valves with high pressure dual springs, or factory size valves with high pressure single springs.

Choosing a Version

The 1 mm oversize version uses larger Ferrea valves with high pressure dual valve springs, the combination T1 fits to the heads in its higher stage engine builds. The OE size version keeps the factory valve size and pairs it with high pressure single springs, for heads that will keep factory size valves.

Design and Performance

Factory valve springs limit how far boost and rpm can be raised before the valves stop following the cam. A matched set of Ferrea valves, stiffer springs and lighter titanium retainers lets the heads keep control at higher boost and engine speed, and T1 supplies the rest of the hardware so the set goes in complete.

Features

Full Ferrea valvetrain for stock R35 heads
1 mm oversize or OE size valves
High pressure dual or single valve springs
Titanium retainers
All supporting components included

What’s Included

Ferrea valves, 1 mm oversize or OE size
Ferrea high pressure dual springs with oversize valves, or single springs with OE size valves
Titanium retainers
All other components needed to upgrade stock R35 cylinder heads

Applications

Nissan GT-R: R35 | 2009-2024 | 3.8L VR38DETT V6

Notes

Camshafts are not included with the Valvetrain Package for R35
Fitting oversize valves involves machine work on the heads, which is the engine builder’s job
Complete heads with a Ferrea valvetrain and CNC porting are available as the T1 Race Development GT1R Race Heads (GT1R Cylinder Heads)

Frequently Asked Questions

What is in the Valvetrain Package for R35? The T1 Valvetrain Package for R35 is a full Ferrea valvetrain for stock VR38 cylinder heads: valves, high pressure valve springs, titanium retainers and all of the other components needed for the upgrade. Camshafts are not included and are chosen separately for the build.
Should I choose oversize or OE size valves? The 1 mm oversize version pairs larger valves with high pressure dual springs. The OE size version keeps factory size valves with high pressure single springs. The choice depends on the head work planned, so decide it with the engine builder before ordering.
Why upgrade the valvetrain? Raising boost and rpm puts more demand on the valve springs to keep the valves following the camshaft. Stiffer Ferrea springs, titanium retainers and Ferrea valves give the heads that control, which is why T1 Race Development builds its engines with a Ferrea valvetrain.
Does it include camshafts? No. The package covers the valvetrain only. T1 Race Development offers its GT1R camshafts and recommends them for most builds from 800 to 2,500 hp, and Bulletproof Automotive can help choose a camshaft to suit the rest of the engine.
Can T1 supply finished heads instead? Yes. T1 Race Development sells its GT1R Race Heads, which are rebuilt, CNC ported and fitted with a full Ferrea valvetrain including 1 mm oversize Competition Plus valves, dual springs and titanium retainers, in Race Stage 1 and Race Stage 2 form.

About T1 Race Development

T1 Race Development was founded in Texas in 2005 by Tony Palo, whose 2000 Acura Integra GSR became the first eight-second front-wheel-drive street car before the shop turned its attention to the Nissan GT-R. T1 went on to become the first to exceed 230 mph in the half mile in a GT-R and the first to make 2,400 whp from the VR38DETT, and it now develops engines, drivetrain parts and complete builds for the R35 GT-R, Lamborghini Huracan and Audi R8.

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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T1 Race Development GT1R Valvetrain Package for R35 Nissan GT-R

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T1 Race Development GT1R Valvetrain Package for R35 Nissan GT-R

Choosing a Version

Design and Performance

Features

What’s Included

Applications

Notes

Frequently Asked Questions

About T1 Race Development

Reviews