Description
Upgrade your Nissan GT-R's turbocharger boost control system with the COBB Tuning LF Bypass Valve (BPV), designed for compatible 2008–2018 Nissan GT-R applications. Engineered for high-boost performance, this compact, lightweight bypass valve is designed to hold elevated boost pressure while maintaining a reliable seal to help support consistent turbocharger operation.
The COBB LF Bypass Valve features an updated internal design that reduces control volume by 30%, allowing the valve to respond quickly when relieving excess boost pressure as the throttle closes. Its lightweight moving components reduce inertia, helping improve valve response compared with heavier designs.
A redesigned banjo-style vacuum fitting provides 360-degree hose-routing adjustability, helping simplify installation and reduce potential leak points. The valve also incorporates a piston O-ring seal twice the diameter of the previous design, providing greater seal compression and helping reduce wear.
The updated spring and seal design delivers a 60% increase in clamping force at peak boost while maintaining similar operation at idle and during transient loads. Spring-seat adjustment is no longer required with this revised design.
Designed as a direct-fit replacement for the factory bypass valve, the COBB LF BPV recirculates pressurized charge air back toward the turbocharger compressor inlet. It is an excellent upgrade for Nissan GT-R owners seeking dependable boost control for street and performance-oriented builds.
Key Features
-
Brand: COBB Tuning
-
Product: LF Bypass Valve (BPV)
-
Part Number: 7C1665
-
Designed for compatible 2008–2018 Nissan GT-R models.
-
Compact, lightweight construction for tight engine bay spaces.
-
Designed to maintain a reliable seal under high boost pressure.
-
Updated design reduces control volume by 30% for faster valve response.
-
Lightweight moving components help reduce inertia.
-
Banjo-style vacuum fitting provides 360-degree hose-routing adjustability.
-
Enlarged piston O-ring seal improves seal compression and helps reduce wear.
-
Revised spring and seal design increases clamping force by 60% at peak boost.
-
Maintains similar operation at idle and during transient loads.
-
No spring-seat adjustment required.
-
Recirculates pressurized charge air toward the turbocharger compressor inlet.
-
Direct-fit replacement for the factory bypass valve on confirmed applications.
-
CARB Executive Order: D-660-10.
Technical Specifications
-
Valve Type: Recirculating bypass valve
-
Design: Lightweight piston-style valve
-
Vacuum Port: Adjustable banjo-style fitting
-
Control Volume: Reduced by 30% compared with the previous design
-
Peak-Boost Clamping Force: Increased by 60% compared with the previous design
-
Seal: Enlarged piston O-ring
-
Installation: Direct-fit replacement on compatible applications
-
Emissions Certification: CARB EO D-660-10
Fitment
2008–2018 Nissan GT-R (R35)
The manufacturer lists compatible GT-R applications across multiple regional specifications, including USDM, JDM, ADM, EDM, Gulf-spec, and other market variants for applicable model years.
Fitment Note: Confirm the exact model year, regional specification, and existing turbocharger setup before ordering. Use COBB Tuning's application guide to verify compatibility with your specific vehicle.
Installation & Compatibility Notes
-
Designed to replace the factory bypass valve on compatible Nissan GT-R applications.
-
Confirm compatibility with the existing intake and turbocharger configuration before installation.
-
Ensure vacuum connections and recirculation hoses are correctly routed and securely attached.
-
The adjustable banjo-style vacuum fitting allows flexible hose positioning.
-
Follow the manufacturer's installation instructions to ensure proper sealing and operation.
Emissions & Compliance Information
The COBB LF Bypass Valve carries CARB Executive Order D-660-10. The California Air Resources Board lists this exemption for compatible 2009–2019 Nissan GT-R 3.8L turbo vehicles. The product's listed fitment is 2008–2018, so verify the applicable model-year coverage and local emissions requirements before installation.
California Proposition 65 Warning
WARNING: This product may expose you to chemicals known to the State of California to cause cancer and reproductive harm.
