GSC Power Division 5069 HP Conical Valve Spring Ti Retainer Kit Nissan VR38DETT

Vehicle Fitment

• 2009-2022 Nissan GT-R (R35, VR38DETT, 3.8L Twin-Turbo V6, AWD)

Fitment Notes

• Fits all Nissan GT-R R35 model years powered by the VR38DETT engine (2009-2022 US market; 2007-2022 JDM/global)
• RACE ONLY - this is a high-pressure kit rated for aggressive cam profiles, high boost, and high-RPM race applications; not recommended for daily-driven, low-RPM, or stock-cam street builds
• Kit includes valve spring shims; use the GSC valve spring install height calculator to confirm proper install heights before assembly
• For builds with less aggressive cam profiles or street/track dual-use applications, the standard pressure conical kit (GSC5068) is also available
• Rated up to 55 psi boost pressure and 10,000 RPM

Features

• True conical valve spring design provides industry-proven advantages over cylindrical and beehive springs, including superior valvetrain harmonic damping and elimination of oscillation under high-lift, high-RPM conditions
• Varying coil diameter and progressive coil spacing allow the conical spring to act as a natural harmonic damper, absorbing and dissipating valvetrain shock to reduce stress, minimize wear, and extend component life
• High pressure specification (102 lbs intake / 108 lbs exhaust seat pressure) supports aggressive aftermarket cam profiles and high-boost, high-RPM VR38DETT builds up to 1,500+ HP and 55 psi boost
• Super-finished surface treatment on every spring reduces surface stress concentrations and improves fatigue resistance over the service life of the spring
• Patented multi-step heat treatment process ensures maximum spring load retention, superior fatigue resistance, and consistent seat pressure across all 24 springs in the set
• Grade 5 titanium retainers are CNC machined to tight tolerances for unmatched repeatability, providing consistent seat pressure distribution across all valves in the head
• Titanium retainers reduce rotating mass at the valve tip, supporting higher RPM capability with less valvetrain inertia compared to steel retainers
• 24 valve spring shims included for precise install height adjustment, allowing accurate tuning of seat and open pressures to match specific camshaft profiles
• Compatible with both OEM and GSC upgraded valve keeper/lock sets; GSC recommends not reusing existing valve locks on performance builds due to material grooving

Specifications

• Application: Nissan VR38DETT (3.8L Twin-Turbo DOHC V6, 24-valve)
• Spring Type: High Pressure Conical
• Intake Seat Pressure: 102 lbs @ 1.324" install height
• Exhaust Seat Pressure: 108 lbs @ 1.306" install height
• Intake Open Pressure: 249 lbs @ 0.879" (11.30mm lift)
• Exhaust Open Pressure: 255 lbs @ 0.861" (11.30mm lift)
• Coil Bind Height: 0.818"
• Maximum Valve Lift: 0.445"
• Maximum RPM Rating: 10,000 RPM
• Maximum Boost Rating: 55 psi
• Power Capability: 1,500+ HP
• Retainer Material: Grade 5 Titanium (CNC machined)
• Quantity per Kit: 24 conical valve springs + 24 titanium retainers + 24 valve spring shims

Included Components

• 24x GSC High Pressure Conical Valve Springs
• 24x CNC-Machined Grade 5 Titanium Valve Retainers
• 24x Valve Spring Shims

Product Description

The GSC Power Division 5069 is the High Pressure Conical Valve Spring Kit with Titanium Retainers for the Nissan VR38DETT, the 3.8L twin-turbo DOHC V6 found exclusively in the Nissan GT-R R35 (2009-2022 US market; 2007-2022 global/JDM). This is the top-tier valvetrain spring solution for serious high-output VR38DETT builds - rated for up to 10,000 RPM, 55 psi of boost pressure, and 1,500+ horsepower - making it the correct choice for GT-R builds running aggressive aftermarket camshafts, large turbochargers, and power levels that render the standard conical kit (GSC5068) insufficient.

The core engineering advantage of a true conical valve spring over cylindrical or beehive designs is its inherent ability to dampen valvetrain harmonics. By using a progressively varying coil diameter and coil spacing, the conical spring acts as a natural harmonic absorber - dissipating shock and oscillation that would otherwise transmit stress into the retainer, valve tip, and camshaft lobes. This is especially critical in high-RPM, high-lift applications where valvetrain instability can cause valve float, premature component wear, and ultimately catastrophic failure. Every spring in the GSC5069 kit also receives a super-finished surface treatment and GSC's patented multi-step heat treatment, which together maximize load retention, fatigue resistance, and consistency across the full set of 24 springs. The included Grade 5 titanium retainers are CNC machined to tight tolerances, delivering consistent seat pressures across all valves and reducing rotating mass for improved high-RPM performance over steel alternatives.

The kit is designed as a RACE ONLY valvetrain upgrade and is not recommended for stock-cam, low-RPM, or primarily street-driven GT-R builds where the elevated seat pressure would add unnecessary load at idle and low RPM. For those applications, the standard conical kit (GSC5068) is the more appropriate choice. The GSC5069 includes 24 valve spring shims for precise install height adjustment - GSC recommends using the install height calculator on their website to dial in seat and open pressures to match your specific cam profile before assembly. For a complete high-performance valvetrain rebuild, this kit pairs with GSC's VR38DETT intake (GSC3046-12) and exhaust (GSC3045-12) Manganese Bronze valve guides, as well as upgraded GSC valves and valve stem seals.