Looking for a better way to filter your 5.9 Cummins? Check out the XDP XD232 CAT Filter Adapter. This billet aluminum adapter works with your existing factory fuel lines and provides increased filtration, using a CAT 1R-0750 filter. With 2-micron filtration, you can be sure your engine is getting the cleanest possible fuel. Keep your Cummins running like new with the XDP XD232 CAT Filter Adapter. Because the CAT Filter Adapter removes the factory filter housing, it will not work on early model trucks that have the lift pump mounted to the fuel filter housing.