The FLO Airride tank is a modular billet tank specifically designed for the air suspension enthusiast. Built with high-quality parts for the clean and impressive air management setup you want. The 4 gallon FLO-BTS air tank from FLO Airride is a modular billet tank that’s specifically designed for the air suspension enthusiast who seeks high-quality parts that make for a clean and impressive air management install. The FLO-BTS 4 gallon air tank is crafted in the USA from high-grade 6061 t-6 billet aluminum with a burst pressure exceeding 1480 PSI. With quality like this, you’ll never need another air tank again. If you’re looking for a different size, be sure to check out the 4 gallon and 5 gallon versions of the FLO Airride BTS air tank!