Performance Cylinder 4 Coolant Mod for Subaru WRX STI EJ20/EJ25 Engines Lift Kits Designed for a sleek look

Designed for a sleek look and improved performance

designed to optimize aerodynamics and elevate your vehicle’s appearance

and the included silencer makes it easy to reduce sound for daily driving

Please check local regulations regarding exhaust system modifications

Performance Cylinder 4 Coolant Mod for Subaru WRX STI EJ20/EJ25 Engines Lift Kits Designed for a sleek lookDescription 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