Performance Cylinder 4 Coolant Mod for Subaru WRX STI EJ20/EJ25 Engines WASH & WHIPS Although the flames lasted for

Although the flames lasted for about 3 seconds

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Performance Cylinder 4 Coolant Mod for Subaru WRX STI EJ20/EJ25 Engines WASH & WHIPS Although the flames lasted forDescription 100% Brand New Color: BLACK Cylinder 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 Compatible with All EJ20 EJ25 engines 2002 2014 Subaru WRX 2004