GSC Power Division EJ Turbo Series Valve Spring Kit (16-Piece) — Fits Subaru EJ Engines

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SKU: GSC5743
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Sale price$299.07 Regular price$332.31
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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.

Watch in action

The Ultimate Valve Spring Upgrade for Subaru EJ Engines

The Subaru EJ series engine is a powerhouse, but it demands a reliable valve train to handle the heat and pressure of turbocharging. The GSC Power Division EJ Turbo Series Valve Spring Kit includes 16 precision-engineered springs designed to keep your engine running smoothly under aggressive driving conditions.

Key Features for Subaru Enthusiasts

  • Complete Set: Includes 16 springs, perfect for a full head refresh or performance build.
  • Turbo-Specific Design: Optimized for the unique characteristics of the Subaru EJ turbo platform.
  • Improved Stability: Eliminates valve float, ensuring consistent power delivery throughout the RPM range.
  • Wide Fitment: Compatible with a vast range of Subaru Impreza, WRX, STI, and Saab 9-2X models.

If you are upgrading your turbo, camshafts, or increasing your boost, the factory valve springs will quickly become the weak link in your engine. This GSC kit provides the increased seat pressure required to keep your valves closed under high boost, preventing power loss and potential engine failure. These springs are the result of extensive testing and are trusted by builders worldwide for their consistency and durability. Whether you are daily driving your WRX or competing on the track, this kit is an essential upgrade for any EJ engine build. Ensure your engine's longevity and performance with top-tier parts from GGCRACING.

Vehicle Fitment

Years Make Model Trim
2005 Saab 9-2X Aero
1999-2001 Subaru Impreza L
1999-2004 Subaru Impreza Outback
1999-2005 Subaru Impreza RS
2002-2004 Subaru Impreza TS
2002-2014 Subaru Impreza WRX
2004-2014 Subaru Impreza WRX STI
2006-2007 Subaru Impreza WRX TR
2006-2007 Subaru Impreza WRX Limited
2006-2011 Subaru Impreza 2.5i
2007 Subaru Impreza WRX STI Limited
2009-2010 Subaru Impreza 2.5 GT
2009-2014 Subaru Impreza WRX Premium
2010 Subaru Impreza WRX STI Special Edition
2010-2011 Subaru Impreza 2.5i Premium
2011-2014 Subaru Impreza WRX STI Limited
2012-2014 Subaru Impreza Base
2012-2014 Subaru Impreza Limited
2012-2014 Subaru Impreza Premium
2012-2014 Subaru Impreza Sport Limited
2012-2014 Subaru Impreza Sport Premium
2015 Subaru WRX STI Base
2015 Subaru WRX STI Limited

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

The Ultimate Valve Spring Upgrade for Subaru EJ Engines

The Subaru EJ series engine is a powerhouse, but it demands a reliable valve train to handle the heat and pressure of turbocharging. The GSC Power Division EJ Turbo Series Valve Spring Kit includes 16 precision-engineered springs designed to keep your engine running smoothly under aggressive driving conditions.

Key Features for Subaru Enthusiasts

  • Complete Set: Includes 16 springs, perfect for a full head refresh or performance build.
  • Turbo-Specific Design: Optimized for the unique characteristics of the Subaru EJ turbo platform.
  • Improved Stability: Eliminates valve float, ensuring consistent power delivery throughout the RPM range.
  • Wide Fitment: Compatible with a vast range of Subaru Impreza, WRX, STI, and Saab 9-2X models.

If you are upgrading your turbo, camshafts, or increasing your boost, the factory valve springs will quickly become the weak link in your engine. This GSC kit provides the increased seat pressure required to keep your valves closed under high boost, preventing power loss and potential engine failure. These springs are the result of extensive testing and are trusted by builders worldwide for their consistency and durability. Whether you are daily driving your WRX or competing on the track, this kit is an essential upgrade for any EJ engine build. Ensure your engine's longevity and performance with top-tier parts from GGCRACING.

Vehicle Fitment

Years Make Model Trim
2005 Saab 9-2X Aero
1999-2001 Subaru Impreza L
1999-2004 Subaru Impreza Outback
1999-2005 Subaru Impreza RS
2002-2004 Subaru Impreza TS
2002-2014 Subaru Impreza WRX
2004-2014 Subaru Impreza WRX STI
2006-2007 Subaru Impreza WRX TR
2006-2007 Subaru Impreza WRX Limited
2006-2011 Subaru Impreza 2.5i
2007 Subaru Impreza WRX STI Limited
2009-2010 Subaru Impreza 2.5 GT
2009-2014 Subaru Impreza WRX Premium
2010 Subaru Impreza WRX STI Special Edition
2010-2011 Subaru Impreza 2.5i Premium
2011-2014 Subaru Impreza WRX STI Limited
2012-2014 Subaru Impreza Base
2012-2014 Subaru Impreza Limited
2012-2014 Subaru Impreza Premium
2012-2014 Subaru Impreza Sport Limited
2012-2014 Subaru Impreza Sport Premium
2015 Subaru WRX STI Base
2015 Subaru WRX STI Limited

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

The Ultimate Valve Spring Upgrade for Subaru EJ Engines

The Subaru EJ series engine is a powerhouse, but it demands a reliable valve train to handle the heat and pressure of turbocharging. The GSC Power Division EJ Turbo Series Valve Spring Kit includes 16 precision-engineered springs designed to keep your engine running smoothly under aggressive driving conditions.

Key Features for Subaru Enthusiasts

  • Complete Set: Includes 16 springs, perfect for a full head refresh or performance build.
  • Turbo-Specific Design: Optimized for the unique characteristics of the Subaru EJ turbo platform.
  • Improved Stability: Eliminates valve float, ensuring consistent power delivery throughout the RPM range.
  • Wide Fitment: Compatible with a vast range of Subaru Impreza, WRX, STI, and Saab 9-2X models.

If you are upgrading your turbo, camshafts, or increasing your boost, the factory valve springs will quickly become the weak link in your engine. This GSC kit provides the increased seat pressure required to keep your valves closed under high boost, preventing power loss and potential engine failure. These springs are the result of extensive testing and are trusted by builders worldwide for their consistency and durability. Whether you are daily driving your WRX or competing on the track, this kit is an essential upgrade for any EJ engine build. Ensure your engine's longevity and performance with top-tier parts from GGCRACING.

Vehicle Fitment

Years Make Model Trim
2005 Saab 9-2X Aero
1999-2001 Subaru Impreza L
1999-2004 Subaru Impreza Outback
1999-2005 Subaru Impreza RS
2002-2004 Subaru Impreza TS
2002-2014 Subaru Impreza WRX
2004-2014 Subaru Impreza WRX STI
2006-2007 Subaru Impreza WRX TR
2006-2007 Subaru Impreza WRX Limited
2006-2011 Subaru Impreza 2.5i
2007 Subaru Impreza WRX STI Limited
2009-2010 Subaru Impreza 2.5 GT
2009-2014 Subaru Impreza WRX Premium
2010 Subaru Impreza WRX STI Special Edition
2010-2011 Subaru Impreza 2.5i Premium
2011-2014 Subaru Impreza WRX STI Limited
2012-2014 Subaru Impreza Base
2012-2014 Subaru Impreza Limited
2012-2014 Subaru Impreza Premium
2012-2014 Subaru Impreza Sport Limited
2012-2014 Subaru Impreza Sport Premium
2015 Subaru WRX STI Base
2015 Subaru WRX STI Limited

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