Billet Thermostat Housing 99.5-03 Ford 7.3L Powerstroke XD277 XDP Early Cummins 5.9 Why do I need a

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Billet Thermostat Housing 99.5-03 Ford 7.3L Powerstroke XD277 XDP Early Cummins 5.9 Why do I need aReplace the old thermostat housing on your 1999. 5 2003 Ford 7. 3L Powerstroke with the XDP 7. 3L Billet Thermostat Housing XD277. Unlike your factory thermostat housing, the XD277 is built to last, featuring a billet aluminum construction for durability and a black anodized finish for superior corrosion resistance. The added rigidity of the billet construction also eliminates the common leak points from the 3 bolt flange on the factory housing. XDP's