EJ Cooling Flow Balance Kit for Subaru EJ20/EJ25 Engines

Cylinder 4 is the most common to break with the Subaru EJ turbo engines. We believe this to be mostly due to coolant flow problems. The 1/3 side of the engine has coolant exiting the back of the head to cool the turbo while the 2/4 side only exits the top of the head to the crossover. There is a pocket of reduced flow at the back of the head. This balance kit will allow coolant to exit the head and go into the heater core lines to increase flow and reduce chance of knock and ringland failure.  Benefits:  Makes more power Longer lasting engine Easy to install - No steering shaft interference! No sealant or cure time needed for the fitting Quality look you expect in your engine bay Allows your head on Cyl 4 to run cooler Reduces chance of knock High quality MADE IN THE USA components   What it does:      The red arrow is the change. The engine will now expel a small amount of coolant to extract more heat from the back of the drivers side head where the flow is low from the factory. We