I bought this because I needed a mounting option for my ARB Air tank, and the ARB folks will not sell that bracket alone. Although on paper the 4L Air tank mounting looks great and the bracket itself mounts well, there is a screw sticking out of my 2-door JL frame that keeps the Air tank from fitting in the space. So, if you're willing to cut off a screw from your frame, and part of the air duct under your passenger seat to fit the large air compressor , this is the kit for you!