Which cars does the LF Bypass Valve for R35 fit?

COBB confirms the LF Bypass Valve for R35 on the USDM Nissan GT-R from 2009 through 2018, plus JDM, EDM, ADM, Gulf Spec, East Asia and South Africa market cars from 2008 to 2017 as listed, including NISMO and Vspec variants. Check your year and market against the Applications list before ordering.

Is this bypass valve legal in California?

Yes. COBB states that the valve carries California Air Resources Board Executive Order D-660-10, which makes it legal for sale and use on emissions controlled vehicles in all 50 states when it is installed according to the application guide from the manufacturer.

Do I need a tune to run the COBB bypass valve?

No. COBB does not list a tune as a requirement for this part, and no Accessport or calibration comes with it. The valve is designed to hold very high boost pressure without leaking, so it suits a tuned GT-R running more boost than stock, where an Accessport map or a custom protuner calibration would already be part of the build.

Does the spring seat need adjusting after installation?

No. COBB removed spring seat adjustment from this updated design. A revised spring and seal give roughly 60 percent more clamping force at peak boost while keeping operation at idle and during transient loads similar to before, so there is no preload setting to dial in once the valve is fitted to the engine.

How does the banjo vacuum port make installation easier?

The banjo fitting on the vacuum port rotates through a full 360 degrees, so the hose can be pointed wherever it routes most cleanly in the tight VR38 engine bay. COBB says this makes the install simpler than with NPT ports and leaves fewer places for a leak to develop.

What changed compared with the earlier COBB bypass valve design?

COBB cut the control volume by 30 percent for faster venting when the valve opens, doubled the diameter of the piston o-ring seal for more seal compression and reduced wear, switched to a banjo vacuum port, and revised the spring and seal so that adjusting the spring seat is no longer needed.

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Description

COBB Tuning LF Bypass Valve for R35 Nissan GT-R

COBB Tuning’s LF Bypass Valve for R35 Nissan GT-R is a compact, lightweight replacement for the valves that release charge pressure from the VR38 intake tract when the throttle closes, and it is CARB exempt under EO D-660-10 for use in all 50 states. Its job is simple: hold very high boost without leaking, then vent quickly when told to. On a stock GT-R the factory parts are adequate; this valve earns its place once a tune raises boost and a leaking valve starts costing you pressure between shifts.

Features

The LF Bypass Valve for R35 cuts control volume by 30 percent for very fast venting of boost, with light moving parts that respond quickly
Banjo vacuum fitting with 360 degree hose routing adjustment
Piston o-ring seal twice the diameter of the previous design for more compression and less wear
Updated spring and seal give a 60 percent increase in clamping force at peak boost
No spring seat adjustment required
Lightweight, compact body sized for a tight engine bay
Manufactured in the USA

Applications

Nissan GT-R: R35 | 2008-2018 | USDM 2009-2018; JDM 2008-2016; EDM 2009-2017; ADM, East Asia, Gulf Spec and South Africa 2009-2016
Nissan GT-R NISMO: R35 | 2011-2016 | JDM 2011-2015; EDM 2015-2016; ADM 2015; Gulf Spec 2016
Nissan GT-R Vspec: R35 | 2009-2010 | JDM, EDM and Gulf Spec as listed by COBB

Notes

Does not include an Accessport or a tune
COBB confirms fitment by market; 2008 is listed for JDM cars only and 2017 for USDM and EDM cars, with 2018 listed for USDM only
50-state legal with CARB EO D-660-10

Frequently Asked Questions

Which cars does the LF Bypass Valve for R35 fit? COBB confirms the LF Bypass Valve for R35 on the USDM Nissan GT-R from 2009 through 2018, plus JDM, EDM, ADM, Gulf Spec, East Asia and South Africa market cars from 2008 to 2017 as listed, including NISMO and Vspec variants. Check your year and market against the Applications list before ordering.
Is this bypass valve legal in California? Yes. COBB states that the valve carries California Air Resources Board Executive Order D-660-10, which makes it legal for sale and use on emissions controlled vehicles in all 50 states when it is installed according to the application guide from the manufacturer.
Do I need a tune to run the COBB bypass valve? No. COBB does not list a tune as a requirement for this part, and no Accessport or calibration comes with it. The valve is designed to hold very high boost pressure without leaking, so it suits a tuned GT-R running more boost than stock, where an Accessport map or a custom protuner calibration would already be part of the build.
Does the spring seat need adjusting after installation? No. COBB removed spring seat adjustment from this updated design. A revised spring and seal give roughly 60 percent more clamping force at peak boost while keeping operation at idle and during transient loads similar to before, so there is no preload setting to dial in once the valve is fitted to the engine.
How does the banjo vacuum port make installation easier? The banjo fitting on the vacuum port rotates through a full 360 degrees, so the hose can be pointed wherever it routes most cleanly in the tight VR38 engine bay. COBB says this makes the install simpler than with NPT ports and leaves fewer places for a leak to develop.
What changed compared with the earlier COBB bypass valve design? COBB cut the control volume by 30 percent for faster venting when the valve opens, doubled the diameter of the piston o-ring seal for more seal compression and reduced wear, switched to a banjo vacuum port, and revised the spring and seal so that adjusting the spring seat is no longer needed.

About COBB Tuning

COBB Tuning was founded by Trey Cobb in 1999 in Rockwall, Texas, as a Subaru performance shop in the back of his father’s tire shop, and is now headquartered in Austin, Texas. In 2004 COBB introduced the Accessport, a handheld ECU tuning device that flashes COBB’s off-the-shelf maps or a custom tune and doubles as a real-time gauge and datalogger. The range has since grown from Subaru to Ford, Volkswagen, Audi, Porsche, Nissan, Honda, Mazda, Mitsubishi and Toyota platforms, with intakes, intercoolers, exhausts and flex fuel kits engineered alongside the tuning, and many COBB parts carry California Air Resources Board Executive Order numbers for use in all 50 states.

Additional Information

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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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