2004 305/555 nv5600 truck. currently running dual stock pumps lbz over 5.9, fleece splitter , scheid drop in cam, .060 shaved off of stock pistons, 150% s&s motorsport nozzles, box s475/83-1.0. lastly HP Tuning by FIREPUNK. For years tried everything also ran it with an s06 TNTR smarty prior to HP. Way more drivable, and nothing ever pulled as hard up top as it does now. So impressed I got Firepunk tuning on my 2006 5.9 as well