AVOTurboworld's Oil Breather Tank Kits are designed for all Subaru turbocharged vehicles and especially ones running big boost and big RPM's. What happens is that the engine increases the amount of crank-case blow-by which in turn causes problems for the stock engine breathing system very quickly due to overload. This can lead to oil being blown into the air-intake, increasing the possibility of detonation due to oil entering the combustion chambers. This can be solved by fitting AVO's oil/vapour separator tank kit, which removes oil mist from crankcase gas before it is returned back to the engines air intake. The kit bolts to the front of the battery for all Subaru models up to 2005. Comes with all necessary parts for a correct installation and the tank is available in a Black color only.