The XDP Duramax Fuel Filter Delete XD163 is a must have for any 2001-2016 GM 6.6L Duramax with a modified fuel system. Specially designed as a bolt-on replacement, the XDP Fuel Filter Delete simply installs in place of your factory fuel filter when using aftermarket fuel systems such as an Airdog, FASS, or custom applications where your factory fuel filter is no longer needed. Built from durable billet aluminum the XDP Duramax Fuel Filter Delete features an o-ring seal with a pre-drilled and tapped port for fuel pressure monitoring, and a threaded base that retains the factory Water In Fuel (WIF) Sensor.