The Davies, Craig "EWP" Electric Water Pump "Header Adapter Kit" is a manifold style system designed to route the water flow through your engine after removing you mechanical water pump housing. This "Header Adapter Kit" works in conjunction with an "EWP" Electric Water Pump to replace your existing belt-driven mechanical water pump on your engine. Further, if your belt-driven, mechanical water pump has a mechanical fan, you will need to replace it with an electric thermatic fan. You also have the option to purchase the EWP/Fan Digital Controller with a built-in switch that will control the electric thermatic fan in conjunction with your new EWP pump.