Billet Oil Catch Can Kit For Mitsubishi Evo 8 9 4G63T VTA Crankcase 03-07 20-018Billet Oil Catch Can Kit For Mitsubishi Evo 8 9 4G63T VTA Crankcase 03 07 The Vent To Atmosphere Catch Can Kit is an open system used for high flowing, high horsepower applications. The closed system options listed above are adequate for most vehicles, however, some loosely built race engines operate with a large amount of boost pressure and the OEM hoses can become too restrictive from excessive blow by. This VTA kit is intended to be used by itself