Professional Products Carburetor Inlet Kit for Holley 4160 (3310) features a fuel inlet kit that features a stainless braided Teflon hose with crimped ends. The inlet fitting is a male -8AN as well as -6AN on selected models. A special adapter allows this to be converted to nipple style fittings. The other end of the bottom fuel line is capped off. This allows additional flexibility if wanting to plumb another line to this connection. The two sections of the kit that attach to the carburetor have the wrench hexes positioned midway instead of up by the carburetor. Many competitive kits have the wrench flats right at the carburetor which makes it very difficult to tighten.