GSC Exhaust Valve – Honda B-Series VTEC – 28mm STD – GSC Power Division - GSC2031-8
Precision-engineered for high-performance Honda builds
This standard-size 28mm exhaust valve is designed for Honda B-Series DOHC VTEC engines. With a 5.5mm stem diameter and 102.60mm overall length, it’s built to deliver consistent sealing and airflow under extreme conditions.
GSC Power Division developed this valve line using advanced 3D modeling and simulation tools to optimize flow and durability. Each prototype is flow-tested in its intended application to ensure maximum performance. The result is a high-strength valve head with minimal face distortion—providing better sealing and long-term reliability in high-heat environments.
Key Features:
- Swirl-polished valve heads enhance airflow efficiency
- Back-cut design reduces weight for improved RPM response and compatibility with aggressive cam profiles
- Micro-polished stems reduce oil retention and drag for smoother valve movement
- Exhaust valves made from modified 23-8n stainless for heat resistance and longevity
- Valve tips feature hardened ends or fused stelite wafers for extended wear life
- Optimized tip height reduces setup time and ensures proper valvetrain geometry
- Keeper grooves are tuned to balance spring pressures and reduce the need for shims
- Compatible with OEM or upgraded keepers/locks (reuse of old locks 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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