GSC +1mm Standard Exhaust Valve – Toyota 2JZ-GE / GTE (30mm) – GSC2063-01
Oversized Stainless Exhaust Valve for Toyota 2JZ Engines
The GSC Power-Division +1mm Standard Exhaust Valve is engineered for Toyota 2JZ-GE and 2JZ-GTE platforms, offering a larger 30mm head diameter for improved flow and performance. Crafted from modified 23-8N stainless steel, this valve is built to handle extreme heat and high-output conditions without compromising longevity.
Designed for Maximum Flow and Durability
Using advanced 3D simulation and flow-testing, GSC developed a valve head that delivers superior airflow and reduced distortion under pressure. The result is better sealing, more consistent performance, and extended life in demanding environments.
Valve Features
- Swirl-polished head enhances airflow and combustion efficiency
- Back-cut design reduces valve weight for improved high-RPM stability
- Micro-polished stem minimizes oil retention and drag for smoother motion
- Modified 23-8N stainless steel for high heat capacity and durability
- Stelite wafer or hardened tips for extended wear resistance
- Optimized tip height for proper valvetrain geometry and easier valve lash setup
- Balanced keeper groove to reduce spring shim use and enhance spring kit performance
- Compatible with OEM or upgraded keepers/locks (reuse not recommended for performance builds)
Specifications
| Stem Diameter | Overall Length | Head Diameter |
|---|---|---|
| 6mm | 99.00mm | 30.00mm |
Fitment:
- 1993–1998 Toyota Supra 3.0L Twin Turbo DOHC (2JZ-GTE)
- 1993–2002 Toyota Supra 3.0L Non-Turbo DOHC (2JZ-GE)
- 1991–1997 Toyota Aristo 3.0L Twin Turbo DOHC (2JZ-GTE)
- 1992–2004 Toyota Crown / Chaser / Mark II / Cresta 3.0L DOHC (2JZ-GE)
- 1998–2005 Lexus GS300 3.0L DOHC (2JZ-GE)
- 2001–2005 Lexus IS300 3.0L DOHC (2JZ-GE)
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