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IAG Performance


GDT Cylinder 4 Chamber Cooling System For 02-14 WRX, 04-18 STI, 04-08 FXT, 05-09 LGT


GDT proudly offers the industry's first Subaru DOHC EJ Cylinder 4 Combustion Chamber Cooling kit that increases coolant flow in the left-hand cylinder head. Improving the coolant's flow improves reliability by reducing detonation causing hot spots. Each kit includes an assembled hose kit that features a high-grade silicone hose and custom machined 6061 anodized fitting. The kit also includes stainless steel pinch clamps and a stainless steel "T" fitting. 

Kit Includes:
  • (x1) Assembled Hose Kit w/ anodized fitting and stainless pinch clamp.
  • (x1) Stainless Steel T Fitting
  • (x3) 316SS or 304SS embossed worm clamps (subject to market availability)
  • (x1) Instructions

Manufactured by GDT - GETaDOMTUNE

Vehicle Fitment: 


The kit is designed to fit the following EJ20 / EJ25 equipped models: 

  • 2002-2014 Subaru WRX
  • 2004-2020 Subaru STI
  • 2004-2008 Subaru Forester XT
  • 2005-2009 Subaru Legacy GT


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