These will fit the old & new style injector for your 2004.5-2007 5.9L truck. It matches nozzles number 1659 & 5500. This is a complete kit that includes the nozzle install tool, 6 nozzles, and 6 copper o-rings.

-Maximizes your fuel more efficiently, better atomization

-You can still drive on the road but will work best for race and sled pulling ect.

-Must be used with our Dragon Fire Extreme CP3 85% over Or bigger

-EDM & Extrude Honed Balanced matched for best results

-Great performance for OVER 650hp

Please call us for info on package deals or for further information!