Billet Thermostat Housing 99.5-03 Ford 7.3L Powerstroke XD277 XDP Early Cummins 5.9 So if you are changing

So if you are changing your injectors

or just looking for extra power when towing

improper installation or pumps that have been tapped for performance modules

a pre-filter is recommended

Billet Thermostat Housing 99.5-03 Ford 7.3L Powerstroke XD277 XDP Early Cummins 5.9 So if you are changingReplace 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