Onboard Air
My brother in law and I spent Sunday installing a Viair system in my Jeep. Compressor is mounted on the wheelwell under the hood, tank is back kind of under the driver's seat and towards the rear.
Switch and gauge installed on the dash in a couple unused places.
Not as easy of an install as we'd hoped (but nothing ever is), but I'm happy with it and it's sure going to be handy!