Formula Road Racing Pro Cell. This FIA-FT3 certified wedge fuel cell comes complete with the following components: • 1.5” fill neck with threaded aluminum fill cap • Dipstick (integrated into fill cap) • -6 rollover vent valve • -6 pickup • Full safety foam baffling • 5 year warranty • 6 US gallon (22 litres) Capacity The CB304 design allows it to work with many of the vintage road racers including the BT29, Formula Ford, Van Diemen and Formula Vee racers. Refer to the mechanical drawing for dimensions