I've got an '07 KC 4x2 with the exact same mods (prothane bushings aren't in yet tho) - and, I've got 08+ 4x4 springs - which would make mine sprung more stiff. Mine rides great..at least, I really like it. I'm placing my bet on those "Fierce Attitude" tire being the problem
EDIT: When you installed your PRG end links to your Stillen sway bar, how many threads did you have showing on them? I've got 6 showing..I'm guessing adjusting them to be longer will make it ride more stiff too?
I think with more threads showing, it's more like not having them connected at all. So more left vs. right side independence on uneven roads or off road ... but a little more lean in a curve until the sway bar will provide any stability.
I just lengthened mine some. I originally took them off because I was getting a side to side rocking on uneven roads with a lot of pothole patches. This went away and I was really happy, but my wife complained she was getting tossed around more. I started noticing this a little after she mentioned it, so I got new Nissan bushings, lengthened the PRG endlinks, and reinstalled. This was super easy to do ... didn't even have to jack it up, but I now have a black eye from the torque wrench hitting my check. :teeth:
crajas88, what psi are you running the tires at?
Although some tire places put in too little, like 35 psi because of the placard on the driver door seal states 35 psi, (but that's for the OEM passenger tires, not a Light Truck tire), but at the other extreme, I've read of tire shops filling them up with the maximum, which is often as high as 65 psi, and even 80 psi on some sizes. That would definitely make for a sh** ride. For most Titans between 40 and 44 psi seems to be a good compromise, but you usually need
around 50 psi to match the load rating OEM Passenger rated tires that max out at 35 psi. An E rated tire, even at 35 psi can be a bit harsh though. My last two sets were E load rated with 3-ply sidewalls, and I'm really liking having a D load rated tire again because of the softer sidewalls.
Prothane bushing thing was interesting ... hadn't heard of it before.
crajas88, a lot of people, even mechanics put together the Bilstein struts incorrectly, and the strut sticks out the top of the coil bucket or something. There are threads on this, (some with diagrams and pics on the proper order), and that might be worth checking too.