GSC Power Division High Pressure Shimless Valve Spring Kit – Nissan RB26DETT (GSC5026)
Optimized for Shimless Bucket Setups
The GSC Power Division High Pressure Shimless Conical Valve Spring Kit is purpose-built for high-performance Nissan RB26DETT engines using non-OEM style shimless buckets. Designed to handle elevated RPM and boost levels, this kit delivers precision, durability, and harmonic stability under extreme conditions.
Kit Contents
- 24 super-finished conical valve springs
- 24 titanium retainers
- 12 chromoly intake spring seats
- 12 chromoly exhaust spring seats
Technical Specifications
- Install Height: 1.305"
- Seat Pressure: 108 lbs
- Open Pressure @ 11.5mm Lift: 258 lbs @ 0.852"
- Coil Bind: 0.787"
- Max Valve Lift: 0.453"
- Max RPM: 11,000
- Max Boost: 60 psi
- Total Spring & Retainer Weight: 38 grams
Conical Spring Advantages
Conical valve springs are proven to outperform traditional cylindrical and beehive designs by naturally damping valvetrain harmonics. Their tapered coil diameter and spacing act as built-in shock absorbers, reducing stress and wear across the valvetrain—especially critical in engines pushed to the edge by aftermarket upgrades.
Built for Boost, RPM, and Reliability
- Super-Finished Surface Treatment: Each spring undergoes a proprietary multi-step heat and surface process for consistent performance and long-term durability.
- Race-Grade Titanium Retainers: Lightweight and strong, engineered to handle aggressive cam profiles and elevated boost levels.
- Shimless Compatibility: Specifically designed for use with shimless bucket setups, ensuring precise fitment and optimal performance.
Perfect for High-Output RB26DETT Builds
If you're chasing higher RPMs, more boost, and tighter valvetrain control, the GSC5026 High Pressure Shimless Valve Spring Kit is built to meet the demands of serious Nissan RB26DETT applications.
Fitment:
- 1989-1994 Nissan Skyline GT-R R32 RB26DETT
- 1995-1998 Nissan Skyline GT-R R33 RB26DETT
- 1999-2002 Nissan Skyline GT-R R34 RB26DETT
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