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GDT Cylinder 4 Chamber Cooling System - Subaru STI 04-20, WRX 02-14


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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 a stainless steel "T" fitting and pinch clamps. The kit is designed to fit all EJ20 / EJ25 2002-14 WRX, 2004-2020 STI, 2004-08 Forester XT, and 2005-09 Legacy GT.

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