4 Coolant Mod Subaru EJ Engines EJ20 EJ25
4 Coolant Mod for Subaru EJ Engines was designed to increase coolant flow to cylinder #4 head area. The additional coolant flow helps reduce cylinder #4 coolant temps and keeps the temps more uniform with the rest of the cylinders. This helps reduce knock and detonation in cylinder #4, which is known to cause the dreaded EJ ringland failure.
- CNC'd 6061 Billet Aluminum Fittings
- Black Anodized
- Multi-Layer Silicone Hose
- Stainless Steel Clamps
Fits:
- All EJ20 / EJ25 engines
- Subaru WRX 2002-2014
- Subaru WRX STI 2004-2020
- Subaru Forester XT 2004-2008
- Subaru Legacy GT 2005-2009