All ATS components are 50-state legal. The EO number on the propane system is pending. Cornaby says that we should get about 2,000 miles from a tank, depending on our driving style. The Torque Pro 2000 system keeps the LPG in liquid form until it is injected into the air tube at the engine. This allows better control and precision. There is a vapor port on the tank so you can even connect your BBQ grill.