The XDP HD Relay To Grid Heater Wires XD440 are a direct replacement for the factory grid heater wiring on your Dodge 5.9L diesel. Built to replicate factory routing and aesthetics, the XD440 wiring connects the grid heater relays to the grid heater and is pre-loomed to provide a clean look and to help guard against heat and abrasion. This wire set is an ideal replacement solution for when the factory relay-to-grid wiring becomes damaged, brittle, or frayed over time. Features and Benefits: Direct-Fit ReplacementGrid Heater Relay To Grid Heater WiringPre-Wrapped Wiring Loom For Added ProtectionRestores Proper Power Delivery From Relay To Grid HeaterIdeal For Repairing Damaged Or Heat-Affected Factory WiringIncludes: (4) Black Alternator Covers(1) Short Wire Wrapped In Loom(2) Longer Relay-To-Grid Heater Wires Wrapped In A Single Loom Details: