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MaxTow's Fuel Rail Pressure Gauge Wiring Harness installs directly to the fuel rail pressure sensor for a clean installation without having to splice into any factory wiring. Simply disconnect the rail pressure harness connector and plug in the new rail pressure pigtail harness into the factory sensor and sensor harness. Connect the green and black wires from the gauge harness to the matching wires on the pigtail harness and you're set! This rail pressure pigtail harness adapter features a length of 6" with 9" sensor and ground lead wires. MaxTow includes installation instructions, a one year limited warranty and free lifetime technical support with each purchase.