Cylindrical Valve Spring Kit – Nissan RB26DETT - GSC5775
Street-Ready Valvetrain Control for RB26 Builds
The GSC5775 Single Valve Spring Kit is designed for Nissan RB26DETT engines running S1 or S2 cam profiles. Ideal for daily-driven setups keeping boost under 32 psi and revs below 8500 RPM, this kit includes 24 cylindrical valve springs, 24 titanium retainers, and 24 chromoly spring seats.
Performance Specs
- Seat Pressure: 80 lbs @ 1.319" install height
- Open Pressure: 199 lbs @ 0.906" lift (10.50mm)
- Maximum Valve Lift: 0.413"
- Coil Bind: 0.845"
- Max RPM: 10,000 RPM
- Max Boost: 30 psi
Precision-Matched for Consistent Performance
Each spring is nano-peened and batched by seat pressure to meet GSC’s exacting standards. The CNC-machined titanium retainers offer unmatched repeatability and tight tolerances—ensuring uniform pressure across the head for dependable performance.
Street-Ready Quality with Race-Level Attention to Detail
These round wire springs deliver the same high-quality craftsmanship found in GSC’s beehive kits, making them a smart choice for RB26 builds that demand reliability without sacrificing drivability.
Fitment:
- 1989–1994 Nissan Skyline GT-R R32 2.6L Twin Turbo
- 1995–1998 Nissan Skyline GT-R R33 2.6L Twin Turbo
- 1999–2002 Nissan Skyline GT-R R34 2.6L Twin Turbo
- Compatible with RB26DETT engines using shim-under bucket setup and S1/S2 cam profiles
- Ideal for street builds with boost under 32 psi and revs below 8500 RPM
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