These will fit the newer style injector for your 2003-2004 5.9L Cummins. It matches nozzles number 5499.
NOZZLES SOLD INDIVIDUALLY
-Great addition to go along with our BAG O PARTS for the 5.9L
-Maximizes your fuel more efficiently, better atomization
-Can be used with stock injection pump, but the bag o parts makes a great addition along with the nozzles.
-Extrude Honed Balanced matched for best results
Industrial Injection Part #: 0433175519DFLY