Torque Solution Cylinder 4 Coolant Mod 2002-2014 WRX / 2004-2021 STI / 2004-2008 Forester XT / 2005-2009 Legacy GT

Torque Solution Cylinder 4 Coolant Mod for Subaru EJ engines is engineered to increase coolant flow specifically to the #4 cylinder head area. This targeted cooling helps lower temperatures in cylinder #4, keeping them more consistent with the other cylinders and reducing the risk of knock and detonation—a common cause of EJ ringland failures.

Quality and reliability were our top priorities. That’s why this kit features CNC-machined 6061 billet aluminum fittings, multi-layer silicone hose, and stainless steel clamps, all built to provide long-lasting performance and peace of mind.

Features:

• CNC 6061 billet aluminum fittings with black anodized finish
• Multi-layer silicone hose for durability and heat resistance
• Stainless steel clamps included for secure installation
• Reduces cylinder #4 temperatures and mitigates knock/detonation
• Helps prevent EJ ringland failure

Fits:

• All EJ20 / EJ25 engines
• Subaru WRX 2002-2014
• Subaru WRX STI 2004-2020
• Subaru Forester XT 2004-2008
• Subaru Legacy GT 2005-2009
  

Installation Instructions