These BD Diesel auxiliary lift pump kits are designed to add a proven second lift pump to extend the life of your fuel system. They will ensure that your VP44 or CP3 pump has ample fuel to support over 600 hp. Don't be concerned about hard starts due to high fuel pressure the BD Diesel auxiliary lift pump kits include a proprietary switch that solves the hard start issues that are common to other auxiliary lift pump kits. Everything you need for a simple installation is included in these kits.