Fuel Line Kits Dual feed fuel line kits include the correct fittings and hoses to properly plumb single carburetor applications when connecting to AN style fitting. Line kits also include a capped -4AN fitting which can be easily connected to a fuel pressure gauge. Black fittings -8AN Holley 4150 center to center 9-5/16″ braided stainless hose dual outlet 7/8-20 Please e-mail with questions.