GSC +1mm Standard Exhaust Valve Set Toyota 2JZ-GE / GTE (30mm) GSC2063-12
Oversized Stainless Exhaust Valves for Toyota 2JZ Engines
The GSC Power-Division +1mm Exhaust Valve Set is designed for Toyota 2JZ-GE and 2JZ-GTE platforms, offering a larger 30mm head diameter for increased flow and performance. Crafted from modified 23-8N stainless steel, these valves are built to withstand high temperatures and aggressive boost levels without sacrificing longevity.
Engineered for Flow, Strength, and Reliability
Developed using advanced 3D modeling and simulation software, GSCs valve head geometry delivers superior airflow and reduced distortion under pressure. Each prototype is flow-tested in real-world engine platforms to ensure optimal sealing and consistent performance under extreme conditions.
Valve Features
- Swirl-polished heads improve airflow and combustion efficiency
- Back-cut design reduces valve weight for better high-RPM stability
- Micro-polished stems minimize oil retention and reduce drag
- 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)
CA Residents: WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov
