for Ford F250 F350 F450 F550 Super Duty with the 6.0L 2003 - 2004 Diesel Engine with BUILD DATE of 1/30/03 thru 9/29/03 ONLY Please be aware that the vehicle compatible chart is not 100% accurate, but the OE# provided in our listing is correct, If you already have OE number of the parts you are looking for, then you can just searching by OE #. About this item Durable material: WMPHE engine standalone wiring harness kit made of plastic and copper wire materials, high temperature resistance and corrosion resistance, and has good contact, good conductivity and durability Model attribute: Replacement for 3C3Z-12B637-BA, 3C3Z12B637BA. This wiring harness attaches directly to your car's engine, repair, control or modify your car, 12-14 volts Matching model: Engine standalone wiring harness compatible with Ford F250 F350 F450 F550 Super Duty 6.0L V8 2003 2004 High durability: A grommet is installed on the wiring harness, including wires, and the design of the sliding bellows sealing ring improves the durability of the wiring harness and allows professional leakproof installation Warm tips: In order not to delay your time, please be sure to confirm whether it is suitable for you before buying, and we recommend professional installation