Fuel slosh control: Minimizes fuel movement during cornering, braking, and acceleration to maintain predictable vehicle handling, High void open-cell foam: 97% void rate means only a minimal 3% loss in overall fuel capacity when fully installed, Broad fuel compatibility: Designed for use with gasoline, E85, methanol, ethanol, and other alcohol-based fuels, Easy installation: Foam blocks can be inserted through the fuel cell fill opening and cut or stacked to fit most applications, Individual foam block size: Sold individually, each block measures 14 x 6 x 4 inches for flexible fuel cell configuration.