This system completely eliminates the need to run the return of your aftermarket fuel pump to the top of the tank or cut into the fuel filler neck, therefore cutting down in install time. This sump also features “clamp in o-ring style seal” instead of a ” ring of bolts “. To install this sump you simply drill 1 hole into your tank, slip the clamp into the tank and bolt up the sump. This makes for a quick, easy, leak free bottom sump. This sump includes two 1/2" barbed fittings for fuel feed line and fuel return line.