GSC Exhaust Valve Set – Standard Size for Mitsubishi 4G63T – GSC2001-8
The GSC2001-8 exhaust valve set is designed for Mitsubishi 4G63T engines, featuring a standard 30.5mm head diameter, 6.6mm stem, and 109.20mm overall length. Sold as a set of 8.
GSC Power-Division engineered these valves using advanced 3D modeling and simulation tools to deliver superior flow and long-term durability. Each prototype is flow-tested in its target application to ensure maximum performance. The result: reduced face distortion, better sealing under extreme conditions, and consistent output over time.
Key Features:
- Swirl-polished valve heads improve airflow efficiency
- Back-cut design reduces valve weight, supporting higher RPM and boost without increasing seat pressure
- Micro-polished stems minimize oil retention and drag for smoother movement
- Exhaust valves use modified 23-8N stainless steel for high heat resistance and extended life
- Valve tips are hardened or fused with stelite wafers, maintaining wear resistance within 5 Rockwell C of the rocker or tappet
- Tip heights are optimized to reduce valve tipping and simplify lash adjustment during installation
- Keeper grooves are precision-tuned to balance spring pressures and reduce the need for shims when paired with GSC spring and retainer kits
- Compatible with OEM keepers/locks or GSC upgraded versions; reuse of old locks is not recommended for performance builds due to material wear
Fitment:
- 1990 Mitsubishi Eclipse GSX 2.0L Turbo AWD 4G63T
- 1991 Mitsubishi Eclipse GSX 2.0L Turbo AWD 4G63T
- 1992 Mitsubishi Eclipse GSX 2.0L Turbo AWD 4G63T
- 1993 Mitsubishi Eclipse GSX 2.0L Turbo AWD 4G63T
- 1994 Mitsubishi Eclipse GS 2.0L Turbo FWD 4G63T
- 1995 Mitsubishi Eclipse GS-T 2.0L Turbo FWD 4G63T
- 1996 Mitsubishi Eclipse GS-T 2.0L Turbo FWD 4G63T
- 1997 Mitsubishi Eclipse GS-T 2.0L Turbo FWD 4G63T
- 1998 Mitsubishi Eclipse GS-T 2.0L Turbo FWD 4G63T
- 1999 Mitsubishi Eclipse GS-T 2.0L Turbo FWD 4G63T
- 1990 Eagle Talon TSi 2.0L Turbo AWD 4G63T
- 1991 Eagle Talon TSi 2.0L Turbo AWD 4G63T
- 1992 Eagle Talon TSi 2.0L Turbo AWD 4G63T
- 1993 Eagle Talon TSi 2.0L Turbo AWD 4G63T
- 1994 Eagle Talon TSi 2.0L Turbo FWD 4G63T
- 1995 Eagle Talon TSi 2.0L Turbo FWD 4G63T
- 1996 Eagle Talon TSi 2.0L Turbo FWD 4G63T
- 1997 Eagle Talon TSi 2.0L Turbo FWD 4G63T
- 1998 Eagle Talon TSi 2.0L Turbo FWD 4G63T
- 1991 Mitsubishi Galant VR-4 2.0L Turbo AWD 4G63T
- 1992 Mitsubishi Galant VR-4 2.0L Turbo AWD 4G63T
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