My Dad has an F-150 and the one that has made the largest visual difference (and how they should have came) are the Bilstein leveling shocks.

Man, hard to say. The 4.56 gears rock, the lockers rock, the 5100s rock, the custom tuning rocks, the tires are pretty good... Although one of my tires sucks, one of them cannot be balanced right. I kept blaming it on the shop but I've rebalanced them 3 times, probably not buying BFGs next time. lol

Two mods go hand in hand. The Edge CTS and modified exhaust with a pre-cat removals and a FLowMaster dual exhaust.

WOW, i thought you loved your km2s lol. I cant wait to get the gears and lockers as well, depending on how the truck drives with the Leveling kit and 35's i might just get those before the lift..

Yeah, eventually ill get a custom exhaust or atleast get high-flow cats and a better exhaust system.. for right now the 40 series will have to do

I do really like the KM2s but just one of mine is out of round of something. Every time I rotate the tires the shake moves. In some positions you can't tell at all. Although to be fair it still could be the shop's fault, I've had the same shop re-balance them. I tried taking the tires to another shop and they wanted $200 to balance them because I didn't buy them there. The shops and people here can be so retarded.

From what I find online, there are a handful of other people who got some that simply couldn't be balanced just right. They did take a butt load of weight to balance, I know that, more than any other tire I've had. The KM2s do seem quieter and smoother than Toyo M/Ts, and more people will say that they are better in mud. The sidewalls are not the strongest on the KM2s which I guess is good and bad. They are lighter than the Toyos, and conform offroad easier when aired down.
I just find myself thinking that I would rather have the Toyos as they seem to be a lot more stout. If I don't lift my truck (yeah yea I change my mind daily) I keep thinking about running 285/75/18 toyos which is a 35x11.50. I originally ordered Toyos for my truck but found out that the 12.50s on stock wheels would not clear the upper control arm so I had to cancel the order, but the 11.50s should be perfect.

interesting! It was a toss up between the toys, km2s and trail grapplers, but the km2s won out in the end. Just better reviews all around..

Mine was wheels and tires. Though I really liked my banks exhaust.

I have been meaning to ask you zach, how loud was your banks? I really need to replace the flowmasters ont he truck in the future as its all rusted and crap, and i cant decide on the rousch offroad or the banks monster..

hard to say, i like all the mods i've done so far but I'd have to say my Volant intake and scoop with the MBRP catback make a huge difference with my Edge tuner. i've removed the tuner a few times because i had to take the truck in for a blown coil (three, make sure your harness isnt chaffing against the fuel rails) and i hate not having the Edge turned on. I love this truck I bought it after my first deployment in 07, and have been adding more an more to it after each one. Adding a Ford Racing radiator, and Maghytec tranny pan next month when i get stateside.

One piece Champion spark plugs...