GSC Power Division Extreme Shimless Valve Spring Kit Nissan RB26DETT (GSC5027)
Built for Shimless Bucket Race Applications
The GSC Power Division Extreme Shimless Conical Valve Spring Kit is engineered for high-output Nissan RB26DETT engines using non-OEM style shimless buckets. Designed to handle extreme RPM and boost levels, this kit delivers unmatched valvetrain control and durability for serious race builds.
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: 140 lbs
- Open Pressure @ 11.5mm Lift: 290 lbs @ 0.852"
- Coil Bind: 0.793"
- Max Valve Lift: 0.453"
- Max RPM: 12,000
- Max Boost: 90 psi
- Total Spring & Retainer Weight: 38 grams
Why Conical Springs Dominate
Conical valve springs are proven to outperform cylindrical and beehive designs by naturally damping valvetrain harmonics. Their tapered coil diameter and spacing act as built-in shock absorbers, reducing stress and wearespecially vital in engines pushed to the edge by aggressive aftermarket setups.
Race-Grade Reliability
- Super-Finished Surface Treatment: Each spring is treated with a proprietary multi-step heat and finish process for consistent performance and long-term durability.
- Titanium Retainers: Lightweight and strong, built 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.
For RB26DETT Engines Demanding More
If you're pushing your RB26DETT to the limit with high boost and RPM, the GSC5027 Extreme Shimless Valve Spring Kit delivers the control, strength, and reliability your build requires.
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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