Cylinder 4 Cooling Mod For Subaru 02-14 WRX, 04-21 STI, LGT, FXT k series We have also fitted the

We have also fitted the arm with a stiffer heat treated neutral return spring

All Factory CPA (Connector Position Assurance Locks)

- Color: Silver

For Fuel/Gas and other common fluid types

Cylinder 4 Cooling Mod For Subaru 02-14 WRX, 04-21 STI, LGT, FXT k series We have also fitted theDescription 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