This kit includes everything you need to convert your stock J30 fuel system to a returnless setup regulated at the correct pressure for all Gen 3/4 Small Block Engines. This kit includes all the hoses and clamps required, pre-cut and crimped. The filter included has a built in pressure regulator, so no external regulator is required. Additionally, the fitting on the discharge of the filter/regulator is a -6AN connection, so upgrading to aftermarket rails at a later date is a simple task and completely compatible with this kit. All hoses are fully compatible with E85.