GSC Power Division 4G63T Exhaust Valve 30.5mm STD Set — Fits 1990-2006 Mitsubishi Eclipse Lancer Evo

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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About GSC Power Division

GSC Power Division engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full GSC Power Division lineup with fast shipping and expert fitment support — order with confidence.

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High-Performance Exhaust Valves for 4G63T Engines

Maximize your engine's thermal efficiency and flow with the GSC Power Division 30.5mm Chrome Polished Exhaust Valve set. Designed specifically for the legendary 4G63T platform, these valves provide the reliability needed for high-boost street and track applications. Each valve is precision-machined to standard 30.5mm specifications, ensuring a perfect seat and optimal heat dissipation under extreme combustion temperatures.

Key Features and Technical Specs

  • Material: High-grade chrome polished stainless steel for superior heat resistance.
  • Size: 30.5mm head diameter (Standard).
  • Quantity: Complete set of 8 exhaust valves.
  • Compatibility: Engineered for 1990-1999 DSM (Eclipse, Talon, Laser) and 2005-2006 Mitsubishi Lancer Evolution 1-9.
  • Durability: Reduced friction and improved sealing compared to OEM components.

Whether you are performing a full cylinder head rebuild or upgrading your valvetrain for increased horsepower, these GSC valves offer the consistency required for high-RPM stability. The chrome-polished finish minimizes carbon buildup, ensuring long-term performance and consistent flow characteristics. These valves are a staple for any serious 4G63 builder looking to maintain factory-spec sizing while gaining the benefits of modern metallurgy. Trust GGCRACING for your high-performance engine component needs.

Vehicle Fitment

Years Make Model Trim
1990-1998 Eagle Talon TSi
1990-1994 Mitsubishi Eclipse GS
1990-1999 Mitsubishi Eclipse GST
1990-1999 Mitsubishi Eclipse GSX
1996-1999 Mitsubishi Eclipse Spyder GST
1991-1992 Mitsubishi Galant VR-4
2005-2006 Mitsubishi Lancer Evolution
2005-2006 Mitsubishi Lancer Evolution RS
2006 Mitsubishi Lancer Evolution SE
1990-1994 Plymouth Laser RS

Product Details

Product Description
Part Numbers
Sizing & Fit

About GSC Power Division

GSC Power Division engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full GSC Power Division lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

High-Performance Exhaust Valves for 4G63T Engines

Maximize your engine's thermal efficiency and flow with the GSC Power Division 30.5mm Chrome Polished Exhaust Valve set. Designed specifically for the legendary 4G63T platform, these valves provide the reliability needed for high-boost street and track applications. Each valve is precision-machined to standard 30.5mm specifications, ensuring a perfect seat and optimal heat dissipation under extreme combustion temperatures.

Key Features and Technical Specs

  • Material: High-grade chrome polished stainless steel for superior heat resistance.
  • Size: 30.5mm head diameter (Standard).
  • Quantity: Complete set of 8 exhaust valves.
  • Compatibility: Engineered for 1990-1999 DSM (Eclipse, Talon, Laser) and 2005-2006 Mitsubishi Lancer Evolution 1-9.
  • Durability: Reduced friction and improved sealing compared to OEM components.

Whether you are performing a full cylinder head rebuild or upgrading your valvetrain for increased horsepower, these GSC valves offer the consistency required for high-RPM stability. The chrome-polished finish minimizes carbon buildup, ensuring long-term performance and consistent flow characteristics. These valves are a staple for any serious 4G63 builder looking to maintain factory-spec sizing while gaining the benefits of modern metallurgy. Trust GGCRACING for your high-performance engine component needs.

Vehicle Fitment

Years Make Model Trim
1990-1998 Eagle Talon TSi
1990-1994 Mitsubishi Eclipse GS
1990-1999 Mitsubishi Eclipse GST
1990-1999 Mitsubishi Eclipse GSX
1996-1999 Mitsubishi Eclipse Spyder GST
1991-1992 Mitsubishi Galant VR-4
2005-2006 Mitsubishi Lancer Evolution
2005-2006 Mitsubishi Lancer Evolution RS
2006 Mitsubishi Lancer Evolution SE
1990-1994 Plymouth Laser RS

Product Details

Product Description

About GSC Power Division

GSC Power Division engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full GSC Power Division lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

High-Performance Exhaust Valves for 4G63T Engines

Maximize your engine's thermal efficiency and flow with the GSC Power Division 30.5mm Chrome Polished Exhaust Valve set. Designed specifically for the legendary 4G63T platform, these valves provide the reliability needed for high-boost street and track applications. Each valve is precision-machined to standard 30.5mm specifications, ensuring a perfect seat and optimal heat dissipation under extreme combustion temperatures.

Key Features and Technical Specs

  • Material: High-grade chrome polished stainless steel for superior heat resistance.
  • Size: 30.5mm head diameter (Standard).
  • Quantity: Complete set of 8 exhaust valves.
  • Compatibility: Engineered for 1990-1999 DSM (Eclipse, Talon, Laser) and 2005-2006 Mitsubishi Lancer Evolution 1-9.
  • Durability: Reduced friction and improved sealing compared to OEM components.

Whether you are performing a full cylinder head rebuild or upgrading your valvetrain for increased horsepower, these GSC valves offer the consistency required for high-RPM stability. The chrome-polished finish minimizes carbon buildup, ensuring long-term performance and consistent flow characteristics. These valves are a staple for any serious 4G63 builder looking to maintain factory-spec sizing while gaining the benefits of modern metallurgy. Trust GGCRACING for your high-performance engine component needs.

Vehicle Fitment

Years Make Model Trim
1990-1998 Eagle Talon TSi
1990-1994 Mitsubishi Eclipse GS
1990-1999 Mitsubishi Eclipse GST
1990-1999 Mitsubishi Eclipse GSX
1996-1999 Mitsubishi Eclipse Spyder GST
1991-1992 Mitsubishi Galant VR-4
2005-2006 Mitsubishi Lancer Evolution
2005-2006 Mitsubishi Lancer Evolution RS
2006 Mitsubishi Lancer Evolution SE
1990-1994 Plymouth Laser RS

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