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 hose connector, stainless steel T fitting along with a multi-layer reinforced Vibrant silicone hose and stainless steel clamps.
Features:
- - CNC'd 6061 Billet Aluminum Hose Fitting
- - Multi-Layer Silicone Vibrant Hose
- -Stainless Steel Hose Tee
- - Stainless Steel Clamps
- - Limited Lifetime Warranty
Fitment:
- 2004-2020 Subaru STI & Type-RA
- 2002-2014 Subaru WRX
- 2005-2009 Subaru Legacy GT
- 2004-2013 Subaru Forester XT
- 2005-2009 Subaru Legacy GT
- 2006-2009 Subaru Spec B
- All EJ20 / EJ25 engines