All Edelbrock fuel rails are machined from high quality extruded aluminum. Each kit includes fuel rails, stands and mounting hardware. Fuel fittings, crossover line and regulator not included. 3644 Big-Block Chrysler 413-440 fuel rail kit for use with Pro-Flo XT Manifold #7144 with standard and compact length injectors. Rails will have a Black Anodized Finish and -6 AN inlet/outlets.