The instructions are terrible. I suggest downloading the instructions from another company, name brand with a history of air ride kits for trucks. Prior to install, I fitted all the pieces together to make sure all hardware was included and every bolt fit. The bolts supplied that hold the air bag to the top plate were incorrect and I had to source my own at the hardware store. Installation is easy if you have the space. The provided 90 degree air fittings are metal, and 1/4\" tube push to connect which is not available on cheaper kits. This allows you to use 1/4\" tubing throughout the install to the compressor, which most mid to higher end compressors have 1/4\" push to connect fittings instead of barb fittings. Great kit at the price point, just wish the instructions were not as vague and the correct hardware was included.