You are suppose to run the higher pressure on the radiator.
Subaru 1 3 bar radiator cap.
And only if you have an aftermarket.
After diagnosing my overheating problem which seemed to have been caused by a busted valve in my radiator cap i am now needing a new one.
For example you would run a 1 3 bar cap on the radiator and a 1 1 bar cap on the turbo tank.
Use the 1 1 bar coolant reservoir cap for the coolant expansion tank which sits atop the intake manifold on every turbocharged subaru we support.
The higher temperature allows the cooling system to absorb more heat.
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Subaru genuine subaru radiator cap forester impreza outback legacy ej25 ej18 ej22 oem koyo sk c13 type a radiator cap red 1 3 bar mishimoto high pressure 1 3 bar radiator cap small.
The turbo tank needs the lower pressure cap since its job is to overflow the coolant into the overflow tank then after shutdown it will suck it back in.
Subaru 13 bar radiator cap subaru limited 2015 st4511355010 rallysport direct 1 888 45 rally.
Cosworth 1 1 1 3 and 1 5 bar high pressure radiator cap.
The 1 3 bar radiator cap will improve the cooling efficiency on the subaru wrx sti.
Keep your engine cool by upgrading to the cobb 1 3 bar radiator cap this higher pressure cap increases the effective boiling temperature of coolant in the system.
I have read a few topics here and there all over the internet with advantages and disadvantages but most have been heresay and there arent many facts to back up what people have posted about in their.