GSC Power Division 2JZ 21-4N Intake Valve 34.6mm +1mm Set — Fits 1993-2005 Toyota Supra Lexus GS300 IS300 SC300

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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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Oversized 34.6mm Intake Valve Set

Take your 2JZ engine build to the next level with the GSC Power Division 21-4N Intake Valve set. Featuring an oversized 34.6mm head (+1mm over stock), these valves are designed to maximize air intake volume, providing the necessary flow for high-horsepower forced induction setups. These valves are precision-engineered to provide a significant performance increase while maintaining the durability required for high-RPM operation.

Technical Advantages

  • Oversized: 34.6mm head diameter (+1mm) for maximum airflow
  • Material: 21-4N Stainless Steel for heat resistance
  • Finish: Chrome polished to optimize intake velocity
  • Quantity: 12-piece set for complete cylinder head upgrade

By increasing the intake valve size, you effectively reduce restriction, allowing your 2JZ to ingest more air and fuel. This is a critical modification for those looking to push the limits of their turbocharger and fuel system. The 21-4N construction ensures that these valves remain stable under high boost pressures and extreme thermal stress. Each valve is chrome polished to provide a smooth, low-friction surface that resists buildup and promotes consistent performance. Whether you are building a drag car or a high-output street machine, this set is an essential upgrade for any serious engine builder. Choose GGCRACING for premium valvetrain components that deliver results.

Vehicle Fitment

Years Make Model Trim
1993-2005 Lexus GS300 Base
2001-2005 Lexus IS300 Base
2002-2005 Lexus IS300 Sportcross
1992-2000 Lexus SC300 Base
1993-1998 Toyota Supra Base
1993-1998 Toyota Supra Twin Turbo

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

Oversized 34.6mm Intake Valve Set

Take your 2JZ engine build to the next level with the GSC Power Division 21-4N Intake Valve set. Featuring an oversized 34.6mm head (+1mm over stock), these valves are designed to maximize air intake volume, providing the necessary flow for high-horsepower forced induction setups. These valves are precision-engineered to provide a significant performance increase while maintaining the durability required for high-RPM operation.

Technical Advantages

  • Oversized: 34.6mm head diameter (+1mm) for maximum airflow
  • Material: 21-4N Stainless Steel for heat resistance
  • Finish: Chrome polished to optimize intake velocity
  • Quantity: 12-piece set for complete cylinder head upgrade

By increasing the intake valve size, you effectively reduce restriction, allowing your 2JZ to ingest more air and fuel. This is a critical modification for those looking to push the limits of their turbocharger and fuel system. The 21-4N construction ensures that these valves remain stable under high boost pressures and extreme thermal stress. Each valve is chrome polished to provide a smooth, low-friction surface that resists buildup and promotes consistent performance. Whether you are building a drag car or a high-output street machine, this set is an essential upgrade for any serious engine builder. Choose GGCRACING for premium valvetrain components that deliver results.

Vehicle Fitment

Years Make Model Trim
1993-2005 Lexus GS300 Base
2001-2005 Lexus IS300 Base
2002-2005 Lexus IS300 Sportcross
1992-2000 Lexus SC300 Base
1993-1998 Toyota Supra Base
1993-1998 Toyota Supra Twin Turbo

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

Oversized 34.6mm Intake Valve Set

Take your 2JZ engine build to the next level with the GSC Power Division 21-4N Intake Valve set. Featuring an oversized 34.6mm head (+1mm over stock), these valves are designed to maximize air intake volume, providing the necessary flow for high-horsepower forced induction setups. These valves are precision-engineered to provide a significant performance increase while maintaining the durability required for high-RPM operation.

Technical Advantages

  • Oversized: 34.6mm head diameter (+1mm) for maximum airflow
  • Material: 21-4N Stainless Steel for heat resistance
  • Finish: Chrome polished to optimize intake velocity
  • Quantity: 12-piece set for complete cylinder head upgrade

By increasing the intake valve size, you effectively reduce restriction, allowing your 2JZ to ingest more air and fuel. This is a critical modification for those looking to push the limits of their turbocharger and fuel system. The 21-4N construction ensures that these valves remain stable under high boost pressures and extreme thermal stress. Each valve is chrome polished to provide a smooth, low-friction surface that resists buildup and promotes consistent performance. Whether you are building a drag car or a high-output street machine, this set is an essential upgrade for any serious engine builder. Choose GGCRACING for premium valvetrain components that deliver results.

Vehicle Fitment

Years Make Model Trim
1993-2005 Lexus GS300 Base
2001-2005 Lexus IS300 Base
2002-2005 Lexus IS300 Sportcross
1992-2000 Lexus SC300 Base
1993-1998 Toyota Supra Base
1993-1998 Toyota Supra Twin Turbo

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