It is compatible with RV QG 5500 EFI, RV QG 7000 EFI and Marquis Platinum HGJAA RV generator models. Used for downtube extension. Includes tailpipe, clamp and hanger. Marquis Gold RV generator sets have a built-in USDA forest service approved spark arrester muffler. It is necessary to equip the generator set with a tailpipe at installation.