Cusco Oil Catch Can - STI 2004-2005 / WRX 2002-2005
CUSC-672 009 AN
The unburned gas which is toxic can remain in the cylinder head of a normal production engine can be returned and sent to the combustion room along with the mixture with this oil tank. Whereas with competition cars the unburned gas let out in the air. This tank will not pollute the air and re-burn the gas.