I installed a VIAIR on board 12v system, 2.5 gallon tank 150 psi. Takes up zero space in the TV or 5er, as it is mounted inside the side wall of the truck bed.
Bought
this VIAIR Compressor on Amazon.
I had installed a PacBrake on our old 2001 Ram 2500 CTD, which came with an air compressor, new 2016 Ram has factory EB so no air compressor. It took about 10 minutes to realize that I missed it greatly.
I devised a mount for the tank, and for the compressor bracket, that didn't require drilling holes in the body or frame.
This is the tank mounting bracket, it uses two bed mounting bolts and two existing threaded inserts near the bed bolts.
This is the bolting up of the tank to the bracket.
This is the tank in place and the compressor bracket attached to the frame with a home made saddle bracket.
Sorry, I don't have a picture of the completed with compressor on the bracket.
Compressor is wired through a relay on 10 gauge wire to come on with the ignition.
The air is useful for airing up tires, and running air powered nailers and staplers. I installed an air chuck in the corner of the bed by the Tailgate, and one under the hood.