GSC +1mm Standard Exhaust Valve Toyota 3SGTE (30mm) GSC2073-01
Oversized Stainless Exhaust Valve for Turbocharged 3SGTE Engines
The GSC Power-Division +1mm Exhaust Valve is precision-engineered for Toyota 3SGTE applications. Featuring a larger 30mm head diameter and a stem length of 99.60mm, this valve is built from modified 23-8N stainless steel to deliver exceptional heat resistance, airflow, and long-term durability in high-performance turbo setups.
Designed for Flow, Strength, and Reliability
Developed using advanced 3D modeling and simulation software, GSCs valve head profile is optimized for maximum flow and minimal distortion. Each prototype is flow-tested in actual engine platforms to ensure consistent sealing and performance under extreme conditions.
Valve Features
- Swirl-polished heads improve airflow and combustion efficiency
- Back-cut design reduces valve weight for better high-RPM response
- Micro-polished stems reduce oil retention and drag for smoother motion
- Modified 23-8N stainless steel offers high heat capacity and durability
- Stelite wafer or hardened tips extend wear life and reduce tappet wear
- Optimized tip height ensures proper valvetrain geometry and easier valve lash setup
- Balanced keeper groove minimizes the need for spring shims and enhances spring kit performance
- Compatible with OEM or upgraded keepers/locks (reuse not recommended for performance builds)
Specifications
| Stem Diameter | Overall Length | Head Diameter |
|---|---|---|
| 6mm | 99.60mm | 30.00mm |
Fitment:
- 1988–1999 Toyota Celica All-Trac / GT-Four 2.0L Turbo DOHC (3SGTE)
- 1990–1995 Toyota MR2 Turbo 2.0L DOHC (3SGTE)
- 1994–1999 Toyota Caldina GT-T 2.0L Turbo DOHC (3SGTE)
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