This Holley kit is intended primarily for those applications running an electric pump. The long wire runs in these kinds of installations can sometimes result in a voltage drop at the electric pump. Installation of this kit is good insurance that the fuel pump will be receiving full voltage from the battery. Product Features:Can Be Used w/Electric Fuel Pump w/Load Not Above 30 Amps12 Amp Wires For Extra Current Capacity With Min. Voltage LossRelay Socket Wired w/Long Leads To Reduce Number Of SplicesInsulated Crimp Connectors Provided To Make The Necessary SplicesDetailed Instructions Included