Predator 68530 (Gen-8750) Natural Gas / Propane Conversion Kit Run on natural gas, low pressure propane or gasoline Additional parts sold separately to run on portable propane tank (Part Numbers:SEK-05A or SEK-05-12A) FOR SINGLE CYLINDER ENGINES ONLY This method moves the air cleaner box out an 1-1/4", which may result in the frame needing to be modified.