Truck: 2013 F250 4x4 6.2L Gas Engine w/ Camper Pack (Assist Springs), Pull-Rite Fifth Wheel Slider, Snow Plow Kit, Hitch Frame Brackets Fifth Wheel, Rear Stabilizer Bar and Rear Axle Lock. If you have a diesel engine you should use installation kit 2535, this kit will not install correctly on a diesel truck. Revain Fit Your Truck does not include an engine so ensure you purchase the correct fitment kit, use the Firestone website to be sure. The rear stabilizer bar will get in the way a bit, the fifth wheel mounts already installed just mean you have to remove the 3/4" bolt before you can get started on the fenders. The petrol engine means there are 3 large wiring looms running through the frame rail on the driver's side, which need to be moved around with the supplied L, which explains it very well. Oiling up the nuts on both fenders and the 3/4" bolts holding the hitch mount in place make life that much easier. A 9/16" ratcheting box wrench was very helpful. When installing the L-Bracket to get the wiring harnesses out of the way, you need to pull out the three plastic retaining clips. One is reinserted into the hole in the L-Bracket, closest to the frame. Make sure the bracket is upside down so that the cables are high enough to access the 3/4" bolt on the inside of the frame rail. To allow adequate clearance for the cables to get you have to pull/slide out the cable holders in front and behind the mounted bracket.It was much easier to lower and remove the spare tire for easier access.Also there is a heat shield on the cover.on the passenger side leading to the Relief can also be pulled out.My air hammer with the 1 1/8" socket installed was too long to fit between the frame and rear wheel so I had to de-air the tire as well distant. Hammer to keep the nut from moving. There was also a bleed tube that connected to the rear axle on the driver's side that I removed so I had more room to work with the bottom bracket assembly without hitting the brake lines connected to it. Airbag into the top bracket, the instructions will tell you to make sure the small tab is positioned correctly so that it fits into the hole in the bracket. What they don't tell you is that there are two holes, one in the front and one in the back, make sure you use the one that centers the bag on the bottom bracket. will be right, the other will put the bag away to the edge. After that was done, the installation was pretty easy. The passenger side is easier than the driver side. I kept about 12 pounds of air in my pockets for normal riding. The 5th wheel shifter adds 200 pounds, in addition to the work box another 100 pounds, the airbags keep the truck level. It's a very stable ride, and the bags take some of the tremors out of bad roads. I included a lot of detail because it sounded incredibly easy in other reviews, but those reviews seemed to apply to older models that didn't have the wiring harnesses on my 2013. Wiring harnesses and removing the existing 3/4" screw added more time and compounded the installation problem. Good luck and have fun - they work great, making the ride smoother and keeping your headlights on the road where they belong.