Outer Limits 4x4 Board

Looking at putting a 2nd tank in but has anyone put in a tripple tank on the floor or do they take up to much room or is it better to put it behind the back seat.

Im running two scuba tanks in front of the diff and a large tank at rear. Tight fit but can be done. Still sorting out set up of gas lines, valves and stuff as mine switch between tanks. Having problems getting enough gas supply. Shouldnt be a prob for non tubo tho

pics of set up please

I'm working on getting some pics up, will try take some tomz