GSC Exhaust Valve – 28mm Standard – Honda B-Series DOHC VTEC – Single – GSC2031-01
Engineered for high-performance Honda valvetrain builds
This standard-size 28mm exhaust valve from GSC Power Division is designed for Honda B-Series DOHC VTEC applications. With a stem diameter of 5.5mm and an overall length of 102.60mm, it’s built to handle the demands of high-RPM, high-boost setups while maintaining long-term durability.
Developed using advanced 3D modeling and flow simulation, GSC’s valve head design delivers superior airflow and reduced face distortion under extreme conditions—ensuring consistent sealing and performance over time.
Key Features:
- Swirl-polished valve heads improve airflow efficiency
- Back-cut design reduces weight for better RPM response and aggressive cam compatibility
- Micro-polished stems minimize oil retention and drag for smoother movement
- Exhaust valves crafted from modified 23-8n stainless for heat resistance and longevity
- Hardened or stelite-tipped valve ends for extended wear life
- Optimized tip height for proper valvetrain geometry and reduced lash setup time
- Balanced keeper grooves reduce the need for spring shims and enhance spring/retainer performance
- Compatible with OEM or upgraded keepers/locks (reuse not recommended for performance builds)
Fitment:
- Honda Civic SiR (EG6, EG9) – 1992–1995 – B16A Gen 2
- Honda Civic Si (EM1) – 1999–2000 – B16A2
- Honda Civic Type R (EK9) – 1997–2000 – B16B
- Honda CR-X SiR (EF8) – 1989–1991 – B16A Gen 1
- Honda Integra GS-R (DC2) – 1994–2001 – B18C1
- Honda Integra Type R (DC2) – 1997–2001 – B18C5
- Honda Del Sol VTEC – 1994–1997 – B16A3
- Honda Civic SiRII (EK4) – 1996–2000 – B16A4
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