The half-moon-shape tank at the front of the spare tire well is the intercooler reservoir, which holds plenty of water and ice to keep the inlet air temps down for a mile of flat-out flying. The tank at the back of the car is for the secondary fuel system. At the time of this car's development, the fuel system solutions were few and far between. As such, the team at Power By the Hour added a return-style cell for the car's racing exploits. The stock system is still there for street duty.