GNP's Cylinder 4 Coolant Mod was designed for Subaru EJ Engines to help 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.
Doing this helps reduce knock and detonation in cylinder #4
GNP's kit includes CNC'd billet aluminum head, stainless steel T fitting along with a multi-layer reinforced Vibrant silicone hose and stainless steel clamps.
Features:
- CNC'd 6061 Billet Aluminum Fitting
- Multi-Layer Silicone Hose
- Stainless Steel Clamps
- Limited Lifetime Warranty
Fitment:
2004-2020 Subaru STI & Type-RA
2002-2014 Subaru WRX
2005-2009 Subaru Legacy GT
2004-2009 Subaru Forester XT
2005-2009 Subaru Legacy GT
2005-2009 Subaru Outback XT
All EJ20 / EJ25 engines