Filter for LPG and CNG vapour.  Recommended for use in all Technocarb injection systems to minimize the carry-over of heavy-end residuals to the injectors.  This filter helps to coalesce any liquid misted past the converter.  One filter is used per injector rail.  In-line 4-cylinder engines require one filter while in-line 6-cylinder, V6 and V8 engines require two filters.