Extreme Pressure Conical Valve Spring Kit – Nissan VR38DETT - GSC5089
Race-Ready Valvetrain Control for High-Boost VR38 Builds
The GSC5089 Conical Valve Spring Kit is purpose-built for high-horsepower Nissan VR38DETT applications. Designed to handle extreme boost and RPM demands, this kit includes 24 conical valve springs, 24 titanium retainers, and 24 valve spring seats—delivering unmatched stability and durability under race-level stress.
Performance Specs
- Intake Seat Pressure: 134 lbs @ 1.324" install height
- Exhaust Seat Pressure: 140 lbs @ 1.306" install height
- Intake Open Pressure: 283 lbs @ 0.875" lift
- Exhaust Open Pressure: 289 lbs @ 0.857" lift
- Maximum Valve Lift: 0.445"
- Coil Bind: 0.793"
- Max RPM: 11,000 RPM
- Max Boost: 70+ psi
- Power Handling: 2000+ HP
Why Conical Springs Excel Under Pressure
Conical springs use progressive coil diameter and spacing to naturally dampen valvetrain harmonics. This design reduces shock, minimizes wear, and extends component life—especially critical in engines pushed to the edge by aggressive tuning and high boost.
Precision-Treated for Maximum Reliability
Each spring undergoes a multi-stage heat treatment and receives a super-finished surface for consistent performance and long-term durability. Whether you're chasing RPMs, dialing in aggressive cam profiles, or pushing 70+ psi, this kit is built to keep your VR38 valvetrain locked in.
Fitment:
- 2009–2024 Nissan GT-R R35 3.8L Twin Turbo
- Compatible with VR38DETT engine builds targeting 2000+ HP
- Ideal for high boost, high RPM, and aggressive cam profile setup
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