Mr. Gasket 7872 Fuel Pump Safety Switch Designed to ensure that the electric pump does not work unless the engine has oil pressure Crafted from high quality material for long lasting durability Prevents the pump from running in a situation where the motor may stall with the ignition on Continues to provide power to the pump as long as there is oil pressure to keep the switch turned on Installed with the pressure sending unit using a T fitting into the block